In no particular order:
Myrmidon - Owain, Lon'qu
Swordmaster - Owain, Lon'qu
Theif - Gaius
Assassin - Gaius
Cleric/Preist - Lissa, Brady
Sage - Lissa, Laurent(his robes seem different from the generic sage)
Troubadour/Valkyrie - Maribelle
Peg. Knight - Sumia, Cordelia
Falcon Knight - (I assume Sumia and Cordelia again)
Great Knight - Fredrick, Stahl, Sully(haven't confirmed)
Mercenary - Inigo, Severa
Hero - Severa, Flavia
Manakette - Nowi, Nah, Tiki
Taguel - Panne, Yarne
Donnell - That pot
Some of that might be inaccurate because a few items were based on things I heard in another topic, i.e. Sully's custom great knight model, and others I may be wrong about because I didn't pay much attention to the models but there you go.