Sableye...but thats just because it's one of my all time faves...

Maybe...Marril?

*coughmudkipcough*

The kids'll eat it up.

Arpy

well because you're oh so very good at monster/complex designs... why not go for a legendary character? like say groudon? or you could go for something unreasonable like say.... porygon? or of course my favorite... zangoose... not that i'm into pokemon now, but he's always appealed to me as he has claws!

Mewtwo, but not the regular 'catch me in the cave' mewtwo, I mean the original 'lab' mewtwo with all of the sick armor.

Seeing the pieces in your collection... I would recomend these guys here:

Girantina

Scizor

I thought I was the only one stuck!

I suggest one of the humanoid ones. Scyther would be awesome.

BToD