RpNation

My gut says 'play a different game', but it depends on what you want. If you want a game which, mechanically, just works in a diverse and balanced way but an emphasis on combat, minis, and maps, go 4e. If you want to put extra work in making a messy system work, go 3e.

If you want something crunchy but diverse, go Pathfinder. But I'd say 13th Age is your best choice - it's not D&D, but D&D can be literally any fantasy game and 13th Age exists in the same broad thematic and design space.