drewish;2302061; said:75-90G is not a "large" tank.
You really don't want to put sunfish in with your pickerel, especially aggressive species such as bluegill, green sunfish, and pumpkinseeds. Longears are iffy, some are aggressive and others aren't.
There aren't too many compatible fish when you're dealing with pickerel. It is best probably to keep them in a species only tank until they are full-size and eating non-live food.
If you have to go with a sunfish, look at warmouth or bantam's. Warmouth are non-aggressive to anything but another warmouth, except small shiners.
Same with Spot gars.....