The striped and cobalt blue are a Ts with special needs. Both of them are burrowing species and should not be kept in a "normal" tank.
The red rump and smithi are a great choice, since both are ground dwelling Ts. They are usually well tempered.
Most burrowing Ts are very defensiv and do not like to be in the open.
You Ts should always thrive not barley survive. A proper setup is crucial for their well being. I know many people could care less. They put their Ts in some average tank and complain when their T gets really sick or die.
You are on the right path
You ask alot and you are very interested in the well being of your little furry friends. Keep up the good work, I wish everybody would care so much.