I concur with Akasha. Either species of ram will usually be fine with angelfish, though it sometimes depends upon the temperament of the angelfish. All of these after all are cichlids.
There are some issues with numbers though, so I will be detailed to ensure everything is understood. First on the angelfish, as you have one it could be difficult adding more. This somewhat depends upon the age and how long it has been in this tank. Angelfish are shoaling fish that live together in small groups. They will establish an hierarchy within that group, and each male can form a territory. If you have a female, adding other angels should be less problematic than if it is a male; a male will quickly form his territory which will be the entire tank space, and any intruders (other angelfish) may not be welcomed. Sometimes re-aquascaping the tank and adding the entire group together can work, if the existing fish is still very young. A 60g long may not have the height for angelfish, so I cannot offer much more now.
As for the rams, in this tank you could try a male and one, two or three females. Rams must select their mates (this applies to most cichlids), and they bond. The safest method is to find a bonded pair from the store tank. It is usually easy to spot a bonded pair. The other method is to buy a small group and allow the fish to form their bonded pairs. With a well planted tank with lots of chunks of wood to break up the area this can work. But even so, sometimes there are fish that will be ostracized and these can be seriously stressed and harassed to the point of death. But the rams and angelfish usually manage together, it is the fish within each species that have the issues.
On your other fish, I would increase the rummynose tetra shoal. This is one species of tetra that is always much better in larger groups, and here I would suggest 10-12 total. This makes a big difference to this fish.
The clown loach poses some problems, as this fish gets large--usually it grows fairly quickly (if it is healthy and in suitable surroundings) to around five inches, and then more slowly up to somewhere between eight and twelve inches, with fish attaining 16 inches possible. This means at least a six-foot tank fairly soon. When this species is in cramped surroundings it may not develop properly, and health issues and a premature death may result. I don't know how large yours are now, but they will need a larger tank soon.
Hope this helps.
Byron.
