This deck is the best fg farmer I know of. I didn't create it, though; I think Sevs did.
Hover over cards for details, click for permalink
6rq 6rq 6rq 6rq 6u3 6u3 6u3 6u3 6u3 6u3 74g 7ap 7n9 7q0 7q0 7q0 7q0 7q0 7q0 7q5 7q5 7q5 7q5 7q6 7q9 7q9 7q9 7q9 7q9 7q9 8pj
Before 1.29, this was the best fg farmer. It's still pretty nice, but SoG took a bit of a hit.
Hover over cards for details, click for permalink
6rn 6rn 6rn 6rn 6rn 7n2 7n2 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q0 7q5 7q5 7q5 7q5 7q5 7q5 7q7 7q8 7q8 7q8 7q8 7qe 7ri 7ri 7ri 7ri 7ri 7ri 7ri 7ri 7ri 7ri 80b 80d 80d 80d 80d 80d 80d 80h 80i 8pu
The next best after those would be some sort of rainbow control; there's several different versions possible. I'd advise you to make your own, though; most of the rainbow control decks I've seen on the forum aren't as good as they could be.
The next 20 posts will probably tell you to play RoL/Hope. Don't listen.
edit: As for win rates, the first deck was reported to have something like 67-69% wins. The second had about 60% wins before SoG nerf, but that shouldn't change much. I have played both these decks, and while I haven't tabulated results for them, these are definitely in the ballpark for accuracy. The best rainbow control deck I've built can win about 50%, and I actually prefer it because it's more fun than the above two.
RoL/Hope has a piss-poor win %; I've seen claims that it wins somewhere in the 30s %, but I think that they aren't counting skips for bad matchups, because in my experience it's not really that high. Proponents of this deck claim that despite the skips, you can win a decent amount of upgraded cards/hour because you concentrate on pwning the few gods this deck does beat. That might well be true, but that kind of play style is not for me.