tragedian vs role player

tragedian and role player both are nouns.

Word	Noun	Adjective	Verb	Adverb
tragedian	Yes	No	No	No
role player	Yes	No	No	No

As nouns, role player is a hypernym of tragedian; that is, role player is a word with a broader meaning than tragedian:

Other hypernyms of tragedian include actor, histrion, player, thespian.

tragedian (noun)	role player (noun)
an actor who specializes in tragic roles	a theatrical performer
a writer (especially a playwright) who writes tragedies	a person who makes deceitful pretenses