There is no “best” broadhead. But there many that will get the job done in a varied set of circumstances.
Some are tougher built, some less likely affected by tuning issues. Some come scary sharp, others are able to be returned to sharp over & over.
A long time fan of thunderheads, I would not feel any less confident with magnus stingers, slick tricks, muzzys, or montecs on the tip of my arrows. That said I will keep plugging away with my thunderheads for the majority of my hunting needs. They’ve never given me a reason to doubt them.