tragedian
US /trəˈdʒiː.di.ən/
UK /trəˈdʒiː.di.ən/

1.
an actor who specializes in tragic roles
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He was a renowned tragedian, famous for his powerful portrayal of Hamlet.
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The young tragedian captivated the audience with his emotional performance.
2.
a writer of tragedies
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Sophocles is considered one of the greatest Greek tragedians.
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Her latest novel reads like a modern tragedian's work.