New fish suggestions?

[Vikkiog]

Hi guys, I've had my tank set up for around 4 years now and I'm gradually losing the fish I started out with (to old age I hope!). The tanks 55g, lightly planted with 2 canister filters and:
5 silver hatchets (lfs have 3 marbled hatchets which I might get)
6 black phantom tetras (only 2 female so looking to get a few more)
7 rummynose tetras (definitely want more)
And 2 danio erythromicrons and 1 flame tetra which are the survivors of large groups from a friends tank. Oh and a few assassin snails and an amano shrimp.
I'd like to have maybe just one or two medium sized fish that would do well in a community but I don't think I want any gouramis. Any suggestions of fish you love having in your tanks please and thank you!

 

[bettaowner]

Pearl gouramis or a pair of german blue rams would look nice

 

[Vikkiog]

Yeah I like the look of gbrs, but I'm sure last time I thought about getting them I read that they prefer acidic water and can get aggressive during breeding season which put me off.

 

[bettaowner]

Bolivian rams would be a hardier option. Unless you condition them to spawn I don't think they would breed