Multiple tangs in a 90g?

[Dlo132]

I have a 90g tank with a hippo tang (blue with black trim/yellow tail)- can I put a kole tang in with it? The tank has In it:
2 clowns
2 skunk clowns
1 comet
1 hippo tang
1 mandarin dragonette
1 hawk fish
2 fire shrimp 2 banded shrimp
Numerous small snails/hermit crabs

Lots of soft coral

Thanks all. Can't seem to find the info in my books.