While I like the idea of Wesley playing more on the wing, I don't see him starting over Clark in that spot and I don't know if Clark can really play the 4 that well, although he did play that some memory serves me right in his first two years. I am guessing that are 7 guys in the running for the top 5 spots by conference play. The other one I would add to your list is Alex Thompson.
Brian Peterson is the one guy I don't really have a good feel for his skills and how he will fit in. It would really help our team to have a steady if not flashy point guard to ease the learning curve for Garrett and provide some stability.