I think it is an absolute requisite to be a successful knifemaker, to have mastered blade grinding. I agree with the names persented. Some more 'successful' than others.
Now, grinding a straight-across bevel on a knife would seem to me MUCH easier than a sweeping grind. I see a lot of names on this list whose work has shown they've mastered the first aspect well. But, are they more versatile in other grinds?
Therefore, what styles would be the HARDEST blade style to grind? For this, I cannot answer and I would defer to the makers.
I would submit that a sweeping dagger grind would be the imminent pinnacle. I dunno. Is, for example, a Brend, Siska, Blackwood flowing hollow-grind easier than a 7" flat-ground hunter? How about a 12" Bowie?
Educate me.
Coop