gentleman adventurer

1 a: a man of noble or gentle birth b: a man belonging to the landed gentry c (1): a man who combines gentle birth or rank with chivalrous qualities (2): a man whose conduct conforms to a high standard of propriety or correct behavior d (1): a man of independent means who does not engage in any occupation or profession for gain (2): a man who does not engage in a menial occupation or in manual labor for gain
2: valet —often used in the phrase gentleman's gentleman
3: a man of any social class or condition —often used in a courteous reference or usually in the plural in address

1. One whose travels are unusual and often exotic, though not so unique as to qualify as exploration.
2. One who lives by their wits.
3. One who takes part in a risky or speculative course of action for profit or position.