I have a Fox tone machine re-issue that I got super cheap. Only fuzz I own. It's dependent on what it sees in terms of input and what preamp it's used with, but some configurations sound awesome in a ZZ Top sort of way.
I Love fuzz, my tastes tend to run to the doomier side of fuzzes that retains a lot of the low-end but I swap other pedals in and out all the time. Currently, I have been farting around at home with BAT Pharoah Supreme (Muff), Fuzzhugger Doom Bloom (w/ clean blend knob) and an EQD Life Pedal (RAT). I swap the Doom Bloom between my bass and guitar rig frequently as it works well with both and has stupid low-end.
I run an EQD Black Ash (Tonebender w/ a big fat ass) on my grab and go board.
Skreddy Lunar Module is what I'm using. It does the legit fuzz face thing but isn't picky about where it's at in the chain. The best fuzz I ever used was the blue Dunlop Hendrix.