feedback for sift mobs

This isn't really really an idea but more of an opinion. since the the sift is coming soon obviously mobs are coming with it. and i think that sifters shouldn't be in vanilla minecraft, or at least not all of them. and here I am mainly talking about the seedling, pollinator, nester and sentinal. i would love to see the harmonizer as a miniboss kind of like elder guardians but instead of being limited to structures they spawn in the wild. same thing about the sprout, there design is unique even though they kinda look like harmonizers. but the rest feel like they are the same mob with different shapes I feel like adding one of these four sifter or maybe a new mob that isn't in dungeons but with the same design would be great. but adding four mobs with very similar designs in a dimension about life, lushness and Variety feels lazy.