EDITS are below.
I was astounded to see this has never been Combo of the Day. Or maybe you're all about to school me on how it's not nearly as awesome as I think it is.
Combo: Fishing Village-Torturer
So this is sort of a cheat since any village-Torturer is a killer combo. The whole point of Torturer is to chain as many as you can together to make your opponent either discard their whole hand or gain a pile of curses, after all.
But Fishing Village, the best village, takes it to another level. The biggest problem with Village-Torturer chains is that they can stall out. Either you draw 3 Torturers with no village, or you play your torturer and draw nothing but money or VP cards. But if you managed to play even one FV the previous turn, your Torturers won't dead-draw, so that takes care of the first problem. For the second, the fact that your Fishing Villages remain out of your deck gives you a functionally smaller deck that makes your Torturers more likely to hit more Torturers, particularly if you dedicate enough turns to building the engine before you start to green.
On top of all that, your Fishing Villages generate money, which your Torturer engine needs more than it needs the extra card. This gives you the freedom to trash more of your coppers and clutter up less of your deck with treasure. And you have less to fear from your opponents' torturers. Go ahead, discard your hand down to a single Torturer. You've got two Fishing VIllages in play, so no matter what you draw you're good to go.
So how do you play this Combo? Step 1, get as many of the Fishing Villages as you possibly can and cheat your opponent out of them! Don't even worry about the Torturers yet. Step 1, get as many Fishing Villages as you can. Particularly in 3+ player games these go fast and you need a critical density of them. Buy your first Torturer when you hit $5 - the draw will up your buying power - but then go back and mop up the FVs. Step 2, get 3 - 5 Torturers. Step 3, play it out, buy Provinces, and wait for your opponent to rage quit. (Step 2 1/2 is buy some money or a +buy if you feel the situation warrants it, but if you got the better of the FV split, and you haven't had to take many Curses yourself, you should be able to get a Province every turn with just your FV money and your coppers.)