controversialist

Example:As a leading polemicist in the field, he regularly engages in heated debates on various issues.

Definition:A person who asserts a particular point of view or opinion, especially in a heated or aggressive manner, often for the purpose of sparking debate or contention.

Example:She would rise to the mantle of a formidable debater, her skills allowing her to win the argument for either side.

Definition:Someone who participates in a formal dispute on a particular issue, often to clear up any doubts or to settle a dispute by an open discussion in front of an impartial audience.