I only play in one world (Leahy). The first three coaches that come to mind are below...
Hawkfan1992 (Iowa): he coaches a non-elite team in a conference with 4 elites (Michigan, ND, Ohio St, Penn St) and consistently competes for the conference title every year. He is a tough recruiter and great game-planner.
Djarelt (Cincinnati): won a national championship at non-BCS Cincinnati, and has multiple Big East championships. One of the best game-planners I've ever coached against. Regularly upsets elite teams in OOC games. Watch out when he gets his hands on an elite program!
Aaronbrown99 (Oregon/Alabama): Had 7 consecutive top-10 seasons with non-elite Oregon and won 6 conference championships in that time (most of them vs. USC). Then took over a 4-9 Alabama team that was in horrible shape and got them rolling immediately.