That's the reason why the Shape, Jason Voorhees, Leatherface, & Freddy Krueger are famous in the first place, the first performance for each set the stage.
You think if they literally just cast any fucker for these roles they'd still be talked about?
As it is, if somebody up and decides there's a cashcow to be milked in another FVJ movie they won't spend two seconds worrying about it being Haley vs. Mears. Now Mears was fine in the remake so it would only make sense to have him reprise the role but it wouldn't necessarily have shit to do with hopping on this great bandwagon of the '09 remake.
Ironically, I do realize the most value Hodder's name ever lent to anything is the Hatchet franchise. So that is one exception where a particular name playing the killer did mean something in the way of credibility. But as far as the big franchises go, the only names that ever meant shit in terms of box office are.......Englund. Then again, I think we can all differentiate between him being a quipster and those other mute behemoths.
It's always important when casting your villain, whether he's a quipster or a mute behemoth. I'm not saying we need an Oscar actor for a role like Jason, just someone like Mears who is actually dedicated to doing more than lumber around. Englund was smart because he promoted Freddy to the masses; any opportunity he had to do an interview, appear as the character, etc. he did it, so naturally Englund stands out among others.
Hell, Englund has a net worth of $14 million. That right there says it all, most people in this business are lucky if their net worth reaches $1 million or anything close.
Obviously this isn't a slight to the quality provided by Gunnar and Doug. But we're talking dollars here. Englund's the only guy who made himself a real name and money in a long-running franchise playing the monster. Gunnar is appreciated more as a craftsman and half the movies Doug was in came after Hellraiser dissolved into DTV excrement.