Definitely Han, but for the turn manipulation, not the taunt protection. He diesn't take many hits. If you want a true taunter, farm RG at 77 from Cantina lvl 8.
I think Han is the offensive tank and RG the defensive tank although RG is pretty good on offense too. With Han you have to work around QG to avoid the dispel.
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confused between Han and HK.
grooming him for more