Diverse Dragons Collection SE (DDCse) Mod
MODAdds 28 leveled enemy dragons with unique models, textures, & abilities, uniting work from over a dozen mod authors.
If it's higher you have to make sure enough DDC dragons are disabled in the menu (each one adds 7 entries), or remove some dragons from other mods.
3) If you use The Dragon Engine, you will not see the extra variation on DDC's dragons, but you will still see it on vanilla dragons when you encounter them.

