This word is acceptable for play in the UK dictionary that is being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. One who kemps, or strives for superiority; specifically, one striving to complete the largest amount of work.

"If you cannot agree, fight it out fairly, either by yourself or per campionem, a champion or kemper man, and God defend the right."

distemper    temper