actor, doer, worker

a person who acts and gets things done; "he's a principal actor in this affair"; "when you want something done get a doer"; "he's a miracle worker"

• demon — someone extremely diligent or skillful
• eager beaver, busy bee, live wire, sharpie, sharpy — an alert and energetic person
• energizer, energiser, vitalizer, vitaliser, animator — someone who imparts energy and vitality and spirit to other people
• go-getter, whizz-kid, whiz-kid, ball of fire — someone whose career progresses rapidly
• man of action, man of deeds — someone inclined to act first and think later
• powerhouse, human dynamo, ball of fire, fireball — a highly energetic and indefatigable person

• person, individual, someone, somebody, mortal, human, soul — a human being