Who is the most underrated casting choice in Comicbook movies?

We all know the big hits, and HUGE misses in the history of comic book movies. Huge home runs like RDJ as Tony Stark, Heath Ledger as Joker, or Hugh Jackman as Wolverine. What about the huge misses, such as Keanu Reeves as John Constantine or Julian McMahon as Dr.Doom. Well here's my question, who is the most underrated casting choice. Someone that did very well, and you don't really hear too much about it?

everyone is Sin City
Same goes for V for Vendetta

Viggo in History of Violence
Tom Hanks and Paul Newman in Road to Perdition
Billy Campbell in Rocketeer
Stuart Townsend in League of Extraordinary Gentlemen
Michael Jai White in Spawn

Honorable Mention- Jonathan Davis in Queen of the Damned (he was lestats singing voice in that horrific film)

OOOH rocketeer is a good choice, he is very underrated.

Some great choices Keymaster... I think out of those I love Michael Jai White as Spawn and Billy Campbell as Rocketeer.

Here is my top 3.
1. Kelsey Grammer as Beast (X-Men last stand)
2. Peter Fonda, as the Devil (Ghost Rider)
3. Jamie Alexander as Lady Sif (Thor and Thor the Dark World)

Here is my top 3. I think Kelsey Grammer was a bright spot in a otherwise dull X-men movie. Peter Fonda as the devil was just crappy, and i LOVED it. Finally, Jamie Alexander in a cast like Chris Helmsworth, Tom Hiddleston, and Sir Anthony Hopkins, Jamie Alexander still shines as Lady Sif.

Honorable mention to Michael Chiklas as The Thing. just sayin!

I would personally like to vote for Ryan Reynolds...  twice.

First as Hannibal King in Blade: Trinity, then also as Deadpool in X-Men Origins: Wolverine.

His role was probably my favorite of each movie, although the 'actual' Deadpool/Wade part was far too short.  (Obviously not the monstrosity that they presented as Deadpool at the end)