Options for mid - upper dwellers:
6-8 Rainbowfish (males have most color)
6-12 Red Serpae Tetras
6-10 Lamp Eye Tetras
6-10 Black Neon Tetras
6-10 Chery Barbs
Options for Centerpiece:
1 Electric Blue Acara
I have all of those fish, except the EBA, dojo loaches, and Super Red BN plecos. Those are fish I've done a lot of research on in the past and always wanted to keep, but have never gotten.
The clown plecos I mentioned only grow to about 3 1/2" long. We have 4 that have been in our community tank for 3 years and they are all 2 3/4" - 3 1/2".
The YouTube channel Prime Time Aquatics has a very good species specific video on Electric Blue Acara's that is worth checking out of you're interested in one of those.
The tetras and barbs I mentioned I've had for 3 years and have always been very hardy in my experience.
I highly recommend Rainbowfish, mine grew very fast and are great fish to keep. I have 2 Boesemani and 2 Australian. I would keep more but tank was already overstocked!
Some people report that the Red Serpae Tetra can be a fin-nipper, but my school of about 10 have always appeared to leave their tankmates alone.
What are your thoughts on scaping your 60g?
Later today I can post a pic of our 65g community tank.
I wouldn't necessarily recommend stocking it the way ours is set up. It has stocking from different tanks that all got consolidated into one, so probably too many fish in there for sure if I were to start from scratch.