As I’m sure you’ve seen on various posts, I mostly use Strathmore Bristol Vellum as the paper for my tiles.
Note: It’s important to understand that this is not thin, translucent vellum. “Bristol” is bristol board, a form of very thick paper. The word vellum, here, refers to the finish on the paper. The vellum finish has a slight tooth to it. Bristol board also comes in a smooth finish, which is very popular for illustration work.