Animal suggestions for paludarium with lots of deep water

My 75 gallon paludarium has about a foot of water under the entire land area with a ramp for climbing back out onto land on each end. There are also clumps of emergent plants all over that a small animal could cling to for support.

I have self-sustaining populations of isopods and springtails on the land and neon tetras, a place, 2 otos, and a bunch of neo shrimp in the water.

Water temp is 82°F. Air Temp is 80°F and RH stays around 80-85%.

I'd like to add some semi-aquatic animals that would thrive in this kind of setup. I'd love to have some frogs. I initially wanted to have dart frogs but I know this setup is not right for them.

A salamander or lizard of some kind would also be cool. I'm not crazy about crabs and I definitely do not want a turtle.

Thanks in advance for your suggestions!