I think a very good rebounder could crack the rotation right away, especially if said player could play the 4. That rebounding is the skill that translates best from college to the pros makes the draft at least a theoretical option to address this short- and long-term need.
Shelden Williams...and Brandon Hunter disagree. Just like with any other skill, if you do not do more than just rebound, you will have trouble being in an NBA rotation.
I'm assuming some general skill level in addition to rebounding. Brandon Hunter was pick #57, at which point single-skill specialists were all that were available. I'm not talking about player like him.
I'm talking about players like, well, Shelden Williams, whose best skill is rebounding, among other lesser skills. Unfortunately, Shelden Williams has been nowhere near the rebounder, defender, efficient scorer he was in college. One of the bigger busts in recent history, even after taking his high draft position out of the picture.
Of course I'd also draft a great shooter, scorer, passer or defender, but those talents tend to be valued a bit more than rebounding, and thus I'm targeting rebounding as an area we could probably target with our late draft pick.