That Sculpt was nice to look at.

Interesting. Every REV sculpt in the old days was used at least 3 times. I think sculpt reuse starting in 2007 would be dominated by What IF (as the OP posted) and Elseworlds. Each had 5 pieces used 3 times, once in each of the common, uncommon and rare siots. I understood the idea, but was not a fan. I bought the DC set, but skipped the Marvel set.

And Starter Set!

I may have missed some
EDIT: found 3 more

Off the top of my head, Atomica and Shrinking Violet.