We have:

1 spotted pleco
1 spotted scat
1 albino rainbow shark
2 bala sharks
2 electric yellow lab cichlids
1 tiger barb
1 golden gourami
3 clown loaches
2 yo-yo loaches
1 jewel cichlid

All in a 60 gallon. They all get along. The spotted scat gives chase every now and then, being the biggest, but it's a good tank. My gf set it up. I'd rather have a bunch of schooling fish, but I gave her the tank for Christmas so she has autonomy.