Well, regardless of how notable any decks posted here are, if you follow any Vintage tournaments, you'll notice that basic lands are less than prominent. I just went here for an example. There are seventeen decklists. And by my count, there are only, let's see... ...only 48 basics between them (give or take). And most of those are Islands. Several of these decks run a few basics alongside duals and fetchlands (in these cases the basics are there to help cushion the blows of nonbasic land hate cards like Wasteland and Back to Basics). I think that describes the general basic land situation in competitive Vintage (although for better data one of the writers for SCG used to make long articles with more detailed statistics but I'm not sure if he does anymore or if they are premium now). Typically Legacy is going to see more basics, but some decks can run without them. Oh, and even excluding powered Vintage decks and dual lands, casual monobrown decks (which Mirrodin sort of killed because everyone maindecked artifact hate like mad) don't use basic lands. I don't know that any were posted here, but personally I have seen them a lot.