Here is a list of the top rebounders, in order. I've highlighted the most obtainable IMO.
Dwight Howard, C
Kevin Love, PF
Andrew Bynum, C
Anderson Varejao, PF
DeMarcus Cousins, PF
Blake Griffin, PF
Kris Humphries, PF
Pau Gasol, PF
Marc Gasol, C
Marcin Gortat, C
Greg Monroe, C
Tyson Chandler, C
Roy Hibbert, C
David Lee, PF
Marcus Camby, C
I personally like Humphries.