I cant really consider Drexler a rent-a-player. He was traded here but always wanted to be here, played almost 4 seasons, won a championship and retired here. My favorite rent-a-rocket is World B Free.
Yao was drafted by the Rockets, therefore he isn't a Rent-A-Rocket. Tmac is too expensive to be lease, he's more like a ARM Mortgage on a mansion on top of the hill.