Okay! Ecko, give Ceniza a list so I'm not making lists for everyone. XD Just edit your post with it.
As for you Ecko, YOU WIN THE SAILOR MOON SLOT~~~~
Like Sailor Moon? Even if not you have no choice!
-MOON PRIDE (Sailor Moon Crystal opening, does indeed have an off vocal)
-Sailor Star Song (Sailor Moon season Stars opening, makes me incredibly nostalgic every time sigh i need to rewatch it someday)
-Moonlight Densetsu (classic original opening - can sing in any language you want, even Swedish/German/whatever if you can find that version's off vocal)