I would have to say Villandra. She is well know for her slayerbelle and elebreyals accounts as well. She is one of the only top players that I know who communicates with the people. She has done podcast with Zybez and she often updates her youtube channel.
She is up there, but only among the "elite" community of rs it seems.
Top three imo of all time are as follows
3. Sixfeetunder (if more people understood how he changed rs today he would be #1)
1. Zezima-will always be the #1 most famous player, was the best when rs took its rise and most of todays hardcore players. Was even pretty popular back in RSC