Rather than selecting fish at random that have a combination of traits you like I would first check pH to make sure you’re not selecting something that will be a long term problem.
You first keep water. Second to that you keep fish that will thrive in the water you have available . Ignoring that aspect can lead to a lot more work and expense. Medicating a big tank is more costly than medicating a smaller tank as well.
Enjoy the journey.
While I am new to large fish and somewhat new to the hobby (3ish years in), keeping nano fish and shrimp in small tanks has taught me to understand water quality management. Yes it is more work and money to modify water but that doesn't really bother me. Like I said in my update post, I have a number of black water tanks (somewhere around 150 gallons total) and as such I am more than used to modifying my tap water which has a TDS of 250-350. I bought an RO unit specifically so I could keep the fish I want.
If you do have any suggestions for bottom dwelling fish I would greatly appreciat them.
Edit: Grammar (missed a comma)