I only have one display snake in a tank, which is my adult corn snake. Not the fanciest, but he's the best display snake I could ask for!
He's always out exploring, and he's an oddball that he doesn't burrow that much: he's usually out being pretty for me to see. I think corns have a lot of personality, and they come in so many nice morphs that I would recommend one for a display: just based on my own.