Here is my E4 team I thought their levels are high but they are small:
Luxray Lv. 47 Staraptor Lv. 51, Infernape Lv. 52, Torterra Lv. 52, Dusknoir Lv. 50, and Crobat lV. 50.
I need tons of stuff for my Platinum (i havent beaten the e4 yet) but here is a list:
Rhyperior (high level)
Gliscor (high level)
Lucario (high level)
Bastiodon or Rampardos (high level)
and the one I desperately need, Empoleon (high level)
I can trade in a few sec. as I am about to be thrashed by Cynthia's Garchomp hold on.