Thing with Jarvis is just that he seems to look and carry himself completely different from the identikit politicians after Blair. As I mentioned before the fact he has had a distinguished career in the armed forces, on the front lines as well, does him no harm at all.
Kendall is another one who is undoubtedly a centrist (a.k.a Blairite)
http://en.wikipedia.org/wiki/Liz_Kendall