Menachem bar Machir
Makes me think that someone should put out an edition of the collected poems of MbM. (Probably not me; I'm more into holidays and rites than individual poets. It's a different way of organizing a book. Both are important.) Davidson lists twenty poems of his, in many different genres (in contrast to many Ashkenazic contemporaries of his, who wrote almost exclusively Selichoth), and I would be surprised if people haven't discovered several more in the past 90 years..