[Snowflakian]

Dr. Strange (70s) It was so corny they didn't even bother to change the costumes anyway.

Hulk from the hulk trilogy in the 80s. May not have had the size right, but it got the rest perfect. (Not so much for thor and daredevil in these.)

Spider-man from the 80s tv movies as well. Hey, it was actually spandex too!

Roger Corman's Fantastic 4
Modern Fantastic 4

Spawn (counts since the comics alter appended variations to the costume at times)

Superman all. Really it's hard to do that wrong, and still call it superman.

Batman Adam west.
Batman. the first keaton one.

The Rocketeer.

Robocop. ( I cheat haha.)
Terminator. ( I cheated again!)
Alien and sequels. (Cheater!)
Predator (Last cheat I swear!)

Sin city
300
Watchmen (painstakingly so)

Punisher
Punisher (modern)
Punisher warzone
(but those really aren't fair, cause frank castle has worn everything at one time or another.)

The Shadow.
Casper
Garfield

Man-Thing
Swamp Thing
Howard the duck
Star wars (okay I lied on the cheating)
Star trek (cheater)
1992 captain america (NOT THE 70s TWO!)

That's all I can think of off the top of my head.
I'm not counting Ironman, and Spider-man (modern) since you mean 100% costume accuracy. And the CBS Justice League movie gave martian manhunter a beer belly, so I can't count that.