New boss will be Tremor! That's official, you suck! No it's not, but I think nobody till now gave this suggestion. He would be bulky enough to look like a boss and very though cuz he's from all types of stones, crystals, metals and has the ability to melt into magma, something like Glacius from KI, but lava!!

He controls earth so he can exploit everything about it.
May be you can up with more interesting and original powers for him if you're a fan' Haters of Tremor are now welcome to comment. Happy new year homies!