As far as I know, Argus are much less 'tamable' than a savannah.. and even savs can be not nice.

If you like smaller monitors, the ackie (varanus acanthurus) is an excellent and beautiful choice. They typically will calm down with handling. There are two varieties.. red and yellow.. red being slightly more expensive.

If you really want a big lizard, the black throat monitor (Varanus albigularis) is a wonderful animal. It's kind of like a 'deluxe' savannah. They also can be 'tame' but still, a 5' lizard can inflict a painful bite or scratch.

Google is your friend.. there is a lot of research to be done.