proponent:

• advocate
• supporter
• upholder
• promoter
• adherent
• exponent
• endorser
• apostle
• patron
• champion
• defender
• backer
• subscriber
• patron
• apologist
• spokesperson
• enthusiast
• propagandist

quixotic:

• idealistic
• romantic
• visionary
• extravagant
• starry-eyed

scattered: