Fish that live in the upper

HI & TIA

I have a 120g freshwater aquarium (not the game fish one at work) with
various freshwater tropical's. Looking for a variety community fish that
will live in the upper portion of the water column and will not spend all
their time hiding behind the plants & in the caves.

I currently have (2) silver dollars (1) striped raphael cat 6" long (2)
loaches? silver/gray with orange tail & fins (5) orange barbs? (2) pleco?
1-7" 1-3"

All but the silver dollars hide and are only seen at feeding time. Silver
dollars stay near the bottom of the tank. Had several neon tetra's (they
hid too) but they were eaten by an oscar that lives in a different tank now.
Had stick fish, elephant??? they hid or stayed at the bottom too. I have
18" of water column that is rarely inhabited.

Thanks
JOhn :-)