Devourer Tahm Kench
It only makes sense right? I mean, he loves to eat things. It sounds absolutely silly, but oddly enough it works beautifully. Tahm Kench can go devourer and just stack health and tank items and let his ult passive do all the work. For added effect build a BOTRK. I am not entirely sure yet if his passive bonus applies twice with Sated devourer but I imagine that it would. In that case, every lick of his tongue he'd be dealing not only the bonus damage from his ult passive, but also the bonus damage from the devourer itself.