I say Quinton Jackson, Matt Hughes, Kevin Randleman (think...Critical countdown), all have great takedowns, but Randy Couture, Karo Parisyan, Genki Sudo (underrated), Daiju Takase, Josh Koscheck, and Kazushi Sakuraba can't be forgotten. those are the people that seem to rely on takedowns though. people like FRank Mir and Babolou have good takedowns but also don't mind if they get taken down.