So I guess with bank being released we can now continue with this, nay?
So I'm gonna go ahead and nominate Heatran for S-rank
Heatran is simply amazing this gen. Even though he received nothing new, what he did receive is a meta where he can act as a reliable check/counter to a lot of top-tier threats like Char-Y and Talonflame. Not only that, but he also finds himself surrounded by Pokemon that form amazing partners with him. Thanks to the Wide Guard Buff, Hitmontop can now block Earthquake as much as he wants to, allowing Heatran to have a field day setting up Substitute. Great Pokemon like Togekiss have nice defensive synergy with him, and with the rise of Charizard-Y (as well as the decline of Politoed), Heatran often finds his STAB attacks being boosted. And SubTran is not the only viable set he has going for him: ErupTran adores the presence of sun, as well as the fact that Trick Room is better than ever. Heatran is an extremely versatile threat that synergizes well with almost any team and has weaknesses that can be easily migitated and therefor he is deserving of S-rank.