Tank mates for Xingu 1s

[humphead]

Hello everyone

I am new to posting here and need a some input. I have a nice pair o Xingu 1s that get along great. They are 9" or so. They are in a 100 gallon tank. I am wanting to put "something" in there but dont know what. Any suggestions?

 

[perfect_prefect]

convicts, silver dollars, red tailed tinfoil barbs, etc.. great for dithers, in case your pikes decide to get aggressive.