Need a fish recommendation

[Acipenser]

Any thing that can go in my 26G bowfront with my "new" anal saddle back clownfish, I was told she killed her last mate of 6 months and she has my poor bi colored Blennie pinned in the corner of the tank - (I am trying to get him out).

And she is absolutely possessive of the GBTA she even chases the hermit crabs away from the LR around her new host.