Harris soaps, GFT soaps, AoS, QED Sandalwood Rose, PC soaps
I'm not a huge fan of Tabac, but I will say it's pretty nice if overrated. It's a bit behind these listed IME.
Agreed on Harris and AOS, haven't tried the others. Based upon your list, you ought to give the Penhaligon's EF a try, if you can still find it in the old formula, and also L'Occitane CADE SS, which is right up there despite it's lack of tallow.
Congratulations on finding MWF, Paul -- it's absolutely a top contender. There is a reason it's been around for over 100 years!!!
Is MWF really that good? I'm tried Susie's bubbles - not much slip, mama bears - like the scents and shave, VDH - a decent cheapy and clean scent, Willams is passable in a pinch. Ogalla bay rum + sandalwood is a great soap for the price. Where does MWF fall in the above array?
IMHO, MWF is in an altogether different league than the soaps you mention, all of which are nevertheless fine products. Give it a try -- you might be surprised at the differences, both in performance and in the way your face feels post-shave.
Enjoy!