Re: MMA guys you would love to see in WWE
Chael Sonnen is, as people are saying, the obvious choice. Other than that I don't know if there's anyone I'd really want in there (not sure I want Chael either, it's funnier with those kind of promos in real sports).
As for the mentioning of Anderson Silva, he's one of the best examples of that an amazing fighter doesn't have to look, or sound, intimidating. The guys getting off on muscular men would cry if he came in.