best glass banger for a 75

[Hendre]

Paradise fish/gourami. No jokes these guys are extremely personable. Mine is in my 70 currently and follows me or my finger against the glass. They are awesome

 

[#.$]

They do have great personality, and tend to fight alot without really causing damage. Fun and colorful fish for sure.

 

[justarn]

Kissing gourami's are cool, would make a good centre piece.

 

[MrsE88]

I second getting a wild caught male green terror.
My female is only semi aggressive towards me when she has fry, but my wc male is always puffing up and banging on the glass is you get close.
He is not a shy fish. I hand feed him and I've been bit more time then I can count. He hits hard too.

 

[Tahn]

Flowerhorn for sure

 

[#.$]

Flowerhorn for sure

Flowerhorns are my favorite when it comes to mid size fish

 

[Tahn]

Flowerhorns are my favorite when it comes to mid size fish

Yup, a glassbanger for a 75 gallon? Flowerhorns are definitively the best answer imo. Unless OP manages to get one of those rare specimens that grow 14+ inches. Most flowerhorns, not just short bods, tend to be more stout and fat rather than long.

 

[Mattk1996]

get a pike cichlid a lot of fun trust me mines at 11 in rn along with a lot more in my 75 plan on upgrading tanks pretty soon though