What size tank?
Ive had plenty of success with keeping boesemani (and other other rainbow species) with medium sized relatively peaceful cichlids, they certainly have no problem with living with Geophagus or Thorichthys species (assuming large enough tank).
Boesemani reach around 5" and can be deep bodied fish, require regular water changes or they dont do very well, a varied diet with plenty of vegetable matter, temps below 26c down to 22c. Minimum size tank for a group of 6 and they need a minimum of a group to be happy is a 55g 4ft tank.