if you have that large of a tank i would defently go with angels get one all black and one all white and call them both michal jackson.. your tank is big enough for at least 5 angels if you dont want discus in the future i would go with 3 smaller angels about 3" then get 3 discus in a few weeks with those numbers you may even get a breeding pair of angels discus or both! just remeber to buy them smaller like 2-4" and not to get a big plate sized fish get them small and they grow to the tank.. also adding larger fish will almost garantee that any smaller fish you get in the future will school ..but on a side note a few barbs i know do well in group of 4 or more and are not bullies are cherry barbs make shure you get the yellower/paler female or the males will loose ther nice red clolour, red line barbs, checkered barbs, odessa barbs, and gold barbs all wont bully other fish in a big tank like yours in they are in at very least a group of 3 preferably 4 no fish in the general size range will bully other fish in aquariums if they are fed properly ther may be a few exceptions but if you stick with tetras barbs angels and discus pluss the fish you already have you wont have any problems