my 55 gallon has 1 JD, 1 Convict, 2 Plecos and a Gold Gourami, they all seem to do fine(when the plecos get too big, ill sell them back to the lfs, turns out they have orders for big plecos all the time so it shouldnt be a problem
maybe i can lasso a fancy pleco for the two of them
to keep all of those fish you would need a 150+gal tank, and pacus will grow to over a foot long, so i would get rid of some.