I think there is more of a continuum than strict tiers - imo and in no particular order...
upper: ARC PH7, ARC Reference Phono 2, Atma-Sphere MP-1, Lamm LP2, Aesthetix IO Sig
middler: ARC PH5, Artemis Labs PH-1, Pass Labs XONO, ZYX Artisan, Aesthetix Rhea,
upper: ARC PH7, ARC Reference Phono 2, Atma-Sphere MP-1, Lamm LP2, Aesthetix IO Sig
middler: ARC PH5, Artemis Labs PH-1, Pass Labs XONO, ZYX Artisan, Aesthetix Rhea,