tank mates for a jdempsy in 125gal tank

I just want to know wich fish and how many could i keep in a 125gal tank with a jack dempsey. i would like similar size and aggresion levels. I dont want to breed.
for now i was thinking
1 dempsey(the main fish i want)
1convict
maby a firemiuth
maby a GTerror
I am gona keep targets and deithers.
thanks.....:spam:i love spam its good fake meat....

i dont know if this will help here is a list i was told:
green terror(i like)
texas
severums
chocolates
salvini(looks cool)
rainbow cichlids
jewlfish
jurupari/demon fish(also looks cool)
maby a pike cichlid

also some one told me philippine live bearing snails are good to clean up tanks cause they only come out at nite but i never herd of them