Can a texas and a jack dempsey and a convict live in a 80 gallon tank?

i have a texas cichlid 4inch and a female convict 3 inch in a 80 gallon tank i have plenty of caves, hiding places for them. but i was wonderin culd i add a jack dempsey with them. if not what other cichlid culd i stick with them. and also will this tank size fit a female con a texas an a jack dempsey for life. i also have a divider incase they get to aggresive which will give them 40 gallon each side .. the dimensions for the tank are 5 ft long 1.5ft high and 1.5ft wide. and also do i have good filterration i have a aqua one 700 canister filter and 2 spr 1100 internal filters.. oh and i also have a 23cm pleco.