“实行者”用英语怎么说？

他是位实行者, 不是空谈者.He's a doer, not a talker.先有行为; 诗人是人生的实行者.Life comes first; the poet is the executor of life.凯恩斯学派和新政实行者们逐渐退场.Keynesians and New Dealers seem to be in a slow retreat....