In no particular order...

1. Naga
2. Lizardfolk
3. Homunculus
4. Grimlock
5. Bugbear
6. Derro
7. Succubus
8. Cockatrice
9. Manticore
10. Shield Guardian
11. Hippogriff
12. Satyr
13. Rakasha
14. Medusa
15. Catfolk
16. Sprites
17. Xorn
18. Golems

... That ought to give you something to work on.

By the way, can I use some of these for my avvie?