For the purposes of the thread only, probably a Rogue/Beguiler/Warblade. Possibly a Factotum/Swashbuckler/Cleric. But that's as much thought as I'm going to put into it.
To be fully frank, I'd never play in such a game and am generally turned off by anything gesalt or which even mentions it. I believe that it violates or attempts to violate the fundamental rule of Role Playing Games, name, "Thou Shalt Not Be Good at Everything." and outside of just for kicks hyotheticals like 'Which Divine Domains would you take if your character began play as a God?" (which honestly sounds more interesting than gestalt if only because its more novel) see the entire concept as a blight on good play.