@simeonz is correct that your "intensionalism" sounds like it's basically virtue ethics.
I think that these different approaches to normative ethics can be better developed and reconciled with each other if they are instead viewed not as competing answers to the same normative ethical question, but as complimentary answers to the different questions within meta-ethics.
The primary divide within normative ethics is between consequentialist (or teleological) models, which hold that acts are good or bad only on account of the consequences that they bring about, and deontological models, which hold that acts are good or bad in and of themselves and the consequences of them cannot change that.
The decision between them is precisely the decision as to whether the ends justify the means, with consequentialist models saying yes they do, and deontological theories saying no they don't. I hold that that is a strictly speaking false dilemma, between the two types of normative ethical model, although the strict answer I would give to whether the ends justify the means is "no". But that is because I view the separation of ends and means as itself a false dilemma, in that every means is itself an end, and every end is a means to something more.
This is similar to how the my views on ontology and epistemology entail a kind of direct realism in which there is no distinction between representations of reality and reality itself, there is only the incomplete but direct comprehension of small parts of reality that we have, distinguished from the completeness of reality itself that is always at least partially beyond our comprehension. We aren't trying to figure out what is really real from possibly-fallible representations of reality, we're undertaking a fallible process of trying to piece together our direct sensation of small bits of reality and extrapolate the rest of it from them.
Likewise, to behave morally, we aren't just aiming to use possibly-fallible means to indirectly achieve some ends, we're undertaking a process of directly causing ends with each and every behavior, and fallibly attempting to piece all of those together into a greater good.
Perhaps more clearly than that analogy, the dissolution of the dichotomy between ends and means that I mean to articulate here is like how a sound argument cannot merely be a valid argument, and cannot merely have true conclusions, but it must be valid – every step of the argument must be a justified inference from previous ones – and it must have a true conclusion, which requires also that it begin from true premises.
If a valid argument leads to a false conclusion, that tells you that the premises of the argument must have been false, because by definition valid inferences from true premises must lead to true conclusions; that's what makes them valid. If the premises were true and the inferences in the argument still lead to a false conclusion, that tells you that the inferences were not valid. But likewise, if an invalid argument happens to have a true conclusion, that's no credit to the argument; the conclusion is true, sure, but the argument is still a bad one, invalid.
I hold that a similar relationship holds between means and ends: means are like inferences, the steps you take to reach an end, which is like a conclusion. Just means must be "good-preserving" in the same way that valid inferences are truth-preserving: just means exercised out of good prior circumstances definitionally must lead to good consequences; just means must introduce no badness, or as Hippocrates wrote in his famous physicians' oath, they must "first, do no harm".
If something bad happens as a consequence of some means, then that tells you either that something about those means were unjust, or that there was something already bad in the prior circumstances that those means simply have not alleviated (which failure to alleviate does not make them therefore unjust). But likewise, if something good happens as a consequence of unjust means, that's no credit to those means; the consequences are good, sure, but the means are still bad ones, unjust.
Moral action requires using just means to achieve good ends, and if either of those is neglected, morality has been failed; bad consequences of genuinely just actions means some preexisting badness has still yet to be addressed (or else is a sign that the actions were not genuinely just), and good consequences of unjust actions do not thereby justify those actions.
Consequentialist models of normative ethics concern themselves primarily with defining what is a good state of affairs, and then say that bringing about those states of affairs is what defines a good action. Deontological models of normative ethics concern themselves primarily with defining what makes an action itself intrinsically good, or just, regardless of further consequences of the action.
I think that these are both important questions, and they are the moral analogues to questions about ontology and epistemology.
In addition to consequentialist and deontological normative ethical models, there is a third common type, called aretaic or virtue ethics, which holds that morality is about the character, the internal mental states, of the person doing the action, rather than about the action itself or its consequences. I hold that that is also an important question to consider, and that that question is wrapped up with the question of what it means to have free will.
And lastly, though it's not usually studied as a philosophical division of normative ethics, there are plenty of views across history that hold that morality lies in doing what the correct authority commands, whether that be a supernatural authority (as in divine command theory) or a more mundane authority (as in some varieties of legalism). That concern is of course wrapped up in the question of who if anyone is the correct authority and what gives their commands any moral weight, which is the central concern of political philosophy.
So rather than addressing normative ethics as its own field, I prefer approaching those four questions corresponding to four kinds of normative ethical theories as equally important fields: teleology (dealing with the objects of morality, the intended ends), deontology (dealing with the methods of justice, what the rules should be), the philosophy of will (dealing with the subjects of morality, who does the intending), and the philosophy of politics (dealing with the institutions of justice, who should enforce the rules).