For Science writers I like William of Ockham, though Nichol Oresme's writing seemed pretty lucid for his day. Among more recent writers, Owen Gingerich is very entertaining [and accurate], and Lynn Thorndike had more amusing anecdotes than anyone.
BTW, in the original post StarLab, why did you call these guys 'Mr.' when 'Dr.' or 'Prof.' would have been a better title in every case [or simply a first name]? Also, Feynmann was great. You would benefit from reading his lectures on physics [with Leighton and Sands].
Forming opinions as we speak