My list in no particular order:

1.Lizard Man
2.Horde Trooper
3.Modulok
4.Melaktha
5.Eldor
6.Glimmer
7.Hydron
8.Veena
9.Huntara
10.Horde Wraiths (Wizards)
11.Sea Hawk
12.Scorpia
13.Filmation Hordak
14.Crita
15.Kay-La
16.Karg
17.Two Bad
18.Mara
19.NA Skeletor (First Season/First toy Version)
20.Strong Arm
21. Darius
22.Calix
23.Dylamug
24.Tung Lashor
25.Tony Guerrero's He-Man (or at least the prototype head with an Oo-lar figure)

Honorable Mention:
26. Lt. Andra
27.Crystoll
28.Filmation Clawful
29.Filmation Tung Lashor
30.Madame Razz with Broom