Quick note: it would appear you've forgotten an E4 member, Agatha. I'm a bit surprised no-one noticed... Hurrah!
Anyway, I'll go with Koga, Blaine, Bruno and Lance. Those four appeal most to me. I like Lance and Koga for the same reason EonFire does; lance is epic, and Koga's a ninja. Bruno and Blaine are pretty cool as well.