I also think the reason Tarquin gets so much hate is not because of what he does in comic, but because he has a lot of fans and admirers in audience and haters think that is simply wrong. Also, the fact that he has yet to make a dumb mistake doesn't help either.

In terms of evilness, I think Nale is much more Evil than Tarquin is. I would peg Tarquin somewhere between Kubota and Bozzok. Kubota is very close, except he was willing to sell his soul to get the power he wanted. Bozzok is a merciless mob boss, but does not indulge in cruelty.