2) CYPHER
Here’s the deal about Doug Ramsey: His power, as explained, make him the most powerful of all the X-Men ever. Able to speak, read and understand any language (including computing languages and, eventually magic, body language and by extension, martial arts), Doug gets no respect because he’s not very superheroic. Instead, he’s one of the most perfect administrative and support characters ever, and his death scene is perhaps the most realistic in comics history. (Doug was shot to death, quite anticlimactically and brutally, leaving his New Mutants teammates to deal with the sudden realization that what they did was dangerous as hell.)