in the 60-70 gallon tank yes, bolivian rams could work, but they are pretty shy fish and should provide them with cave and plants to hide in.
But you are really overstocked right now. If i could suggest something, you should rehome your pleco. Cool as they are and as helpful as they can be with algae, he'll grow VERY fast and VERRYY big (up to 18" long). I made the same mistake. I started with a 2" long common pleco in a 20 gallon tank and he was over half a foot long in 3 months. Plus, they are very messy and add alot to the bioload in the aquarium.
the bolivian rams could work in a 60-70 gallon tank, but no more fish for now
