Or you can just go through the ninja list.... pay attention to people who specialize in evasion/dodging, people who shield themselves every turn or with a mystery skill, people who get more defensive stats every time they get attacked.

A few solid relatively easy to get tanks: Hinata, neji, gaara(if you can miss ingots), naruto (3 star preferably). You c*so use clones and puppets to tank, ninja war kiba, kakashi, kankuro, naruto (again), kabuto, sai.

I probably missed some but the above are relatively easy to get just by doing a few elite missions or following the story. Just be careful against fire mains if your going to use naruto since fire is his weakness and fire tends to use a bit of area damage so his clones die easily.

Kisame is a good tank as long as he doesn't get ignited or if you have a good debuff remover. But he is kinda hard to get at this stage. But if you have him in combination with someone else who gives chakra to you like kurenai he heals a lot and is pretty much unkillable.