Anyone of these - they are all 'desert island' brushes for me. Any single brush in my rotation has to pass the " would I be content to use this one for the rest of my life" question.
The first four I use for pucks (lathered on face or in bowl) and the last four are for sticks (although I sometime use the da Vinci with pucks in the bowl also).
FS 28 mm Pur Tech, M&F Chief, 25/50 mm D01 Shavemac, 26/60 mm TGN F2 finest
23 mm Mühle STF2, da Vinci 293, 23/51 mm Shavemac finest, Vie-Long 24/50 mm custom white horse