With a taller tank you may want to have an upper level fish so there's some activity up there. Both bolivian rams & corys are bottom or very low level swimmers. Pygmy or other dwarf corys might be a good choice for a smaller tank.
If you don't want to have the Bolivians breed then just 1 would be good
. It sounds like you don't & that's ok. Fry can be fun but cichlids can breed every month, it gets old in a way. It doesn't sound like you want a "project" right now.
Most tetras are low-mid water level swimmers. I haven't kept pencil fish or hatchets (the cute little marbled kind) but hatchets will jump!! A tight cover is a must. If you're not New World-centric I love rasboras of several, kinds but mid level schoolers...not really upper level.
A dwarf gourami would be ok size wise but I haven't seen really healthy 1s in many, many years (see iridovirus, dwarf gourami disease. It's fatal). Honeys can get it too but not as likely. I've always liked honeys but never had the right tank at the right time. Some say they're more school-y than other gouramis. I would do a M & F pair, maybe 1M, 2 F, & skip the tetra/pencil/hatchet idea. I'm not sure how a single honey would do...research more!
Let's just mention substrate before you get a tank. Cichlids (& corys to a lesser extent) tend to "chew" sand & either spit out back out their mouths or maybe out the gills if smooth & fine enough. So you want sand or fine gravel so your Bolivian can do that. Even medium gravel will not allow them to do that much & a lot of food & poo will fall between the gravel & you'll have to vacuum it out. No pea gravel, it's too coarse.
& now for my usual live plant nagging thoughts. Some plants are super easy & upper level fish like gouramis & hatchets especially like them. Honeys for the bubble nesting thing, hatchets so they know where the top is & less apt to jump. Just think about it, we can talk about plants later.