You are wrong. Firstly, a pantheon of creatures was built around just one demon, right? Secondly, let's forget about a completely flying race. No faction has ever consisted entirely of one race. Angels will act as mages – who have their created/joined units.

Angels as a race... hmm... no, there aren't 7 types of angels...

You're mistaken; in Christian mythology, there are as many as 9 types. Seraphim, cherubim, thrones, dominions, powers, authorities, principalities, angels, and archangels. But no one will really make 7 types of angels. We need several creatures – not angels. A series of logically interconnected (at least in spirit) creatures. You could create a series of incorporeal spirits. Or – in a material form.

A series of creatures suitable for them:

- Centaur. Like angels, it is white and fluffy.

- Prophet. Remember the 10 plagues of Egypt? A ranged attacker and caster.

- Seraphim/Cherub. Guardian angels with a lion's head.

P.S.: Who said it's impossible to make a vampire race? I did! )