All right, Saruman the (pipe)weed user is confirmed even in movie canon! He needs a substance abuse counselor. (sorry the mental image is cracking me up, omg, I am too easily amused)

I'm no good at actually writing out my headcanons, so it's a good thing I can get people to write it for me! :D

And yeah, now that you mention it I'm pretty sure Oropher is mentioned somewhere in the Appendices. That makes sense, since he was involved in the Last Alliance, and then after that Thranduil founded his realm. Celeborn and Galadriel -- that almost sounds like Amdir or Amroth?