Greedier Bosses is a cosmetic mod that will include Greed-themed reskins for all bosses that appear in Greed mode.
My intention is to restrict the reskins to Greed mode for thematic reasons but for now it's active universally.

This mod is still very early in development so only a handful of bosses are playable and those that are may be janky and unpolished.

This content is also available on the steam workshop.