Good tankmates for my tank please?

A colorful addition of 2 x German Blue Rams (1 x Male & 1 x Female) would do nicely.

Or you could put a peppermint bristlenose

a school of neons or some other form of schooling tetra

I like schools of fish, tetras, rasboras, cherry barbs,

and the smaller cichlids like the kribensis and rams

and the celebes rainbows or other feather fin rainbows, but in groups/schools

Neon tetras. They will look fantastic in that tank because of the flashy colour they show off.

I would get six tetra pristellias. they are only two dollars each and they grow to be two and a half inches. don't get any less than six, because they will only survive and be cheerful and active in a school of six or more