I have a blue who I have had the longest, he is just a hair shy of 4 feet long and weighs in at about 6lbs.

I also have a female black and white who is about 3 and a half feet long. I don't know her history too well, I have had her for a few months now and she is just a doll.

Both my tegus get along great with each other.

Tegus are a lot of fun, and a bit of work. Compared to the other lizards on your list though they are a good starter into large/giant lizards.