If I can pick only 30 you say?
Well, 3 is even tougher, but I'll try:
Hermie Odel - he'd look real nice next to Amanaman and Ephant Mon!
Gargan - another must have. She almost made it in the vintage line, but exsists only as a prototype
Jabba (ROTJ style) - having all these cool aliens is great, but if we don't have an awsome version of the main man himself, what's the point!