Well, here's the thing most people miss when they are searching. It ALL comes down to what YOU like.
There are statistical sweet spots of course. Bowl latherers tend to like longer, less dense brushes with longer handles. Face latherers tend to prefer stiffer, shorter brushes with softer tips.
So you'll see general recommendations for things like Kent or a softer boar like the SOC for bowl and Chubby or Stubby or a stiffer boar for face.
But, in the end, only you can figure out what really works for you. Me, for example. I face lather hard soaps. But my favorite brushes are medium dense and quite large (Kent BLK12, Shavemac XXL and Rudy Vey all three are around 30mm knots, the first two have somewhat taller lifts). For my use, I doubt I'd get many recommendations to try these brushes (especially the first two)
Actually, I disagree with this point. The cost of "rolling your own" makes it much easier to try a wider variety and figure out what YOU prefer.
I also plan on doing some builds or restores very soon since it's cheaper, but not knowing the above info really kinda puts a damper
Rooney 3/3 Finest, MdC, iKon OSS with Med Preps, AOS AS balm