Mono Colored Commander Suggestions

So I am here for suggestions about completing my mono colored commander decks. I currently have: White- ? Blue- Azami wizards Black- Chainer graveyard shenanigans Red- Hedetsugu double damage (or Krenko goblins) Green- ?

Looking for your suggestions for White and Green mono colored commanders and why you like them. If it is on theme for color identity that is a plus. I think the end goal is to have them be playable in a star format(be the first to kill your 2 enemy colors). Dont worry about the power of the commander/deck as I will do the balancing on my end.Thanks!