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I like your list. Have you tried G28, Oly 50/2 Macro, Nikon 105/1.8, Sigma 150 Macro and Pentax 85/1.4 A?
I have G28/2.8 Biogon and like it a lot,though prefer C/Y 28/2.8Distagon for it's more even sharpness across the frame.
I used to have Sigma 150/2.8 in EF mount (sold it when decided to shift to MF alt lenses as my main equipment) - truly great lens with it's own character.
Never had or tried Nikon 105/1.8,Pentax 85/21.4 and Oly 50/2 macro,but who knows,maybe I'll spot one of these somehow?