I’d have to pick alberich, the fact that he can revive is insane
Hate to break it but depends on what you are interested.
My 5 cents.
Titan/ hard monsters? Argued fight between Athena and Wukong. I’d bet more money on Athena since constant def reductions is what has led to 1 hit KO titan attacks.
Raids? Hel. No questions asked about her.
Someone once made a list of which was the best hero (and there may have been a separate list of the heroes most found in the top 100…I conflate the two.). I think Lianna was at the top.
Now that we have new heroes, someone will need to make a new list!