Lyxen
Great Old One
Some have said so, but 4e is D&D even though it doesn't feel like the rest of the editions. PF2e is factually not D&D in any way. Its last common ancestor with D&D is 3.5e, but it has definitely evolved independently from D&D since then.
Not speaking of intrinsic qualities, but I think that PF2 is still closer to PF1 and thus 3e than 4e ever was, so if you include PF, you have to include PF 2.