Henderson, Davis, and Gustafsson have not fought Jones and are ranked higher, but the UFC doesn't care about that kind of thing anyway.
Glover certainly sounds 100 times better than Sonnen and is ranked in the top 10 on ESPN. He has 17 finishes in 19 fights. If he does really well against Rampage at least it proves there is some mystery to the outcome.
*Edit: I meant to say 17 finishes in 19 wins.