Some of the more prominent artists with the last name starting with R up to the mid-1900's (the late modern art and contemporary artists are not this famous...)
Renoir
Rockwell
Rubens
Durer
Dore
Duchamp
Also, Raphael and Rembrandt are both very famous, although only their first names start with R. Hope this helps.
Tinie Tempah
Malcolm X
Scott Stevons- Hockey Player
Edward R. Murrow
yes like jack black
Hitler
juan horward
Sacher, Louis
ray Lewis
Emmit Smith
Tinie Tempah
Dan Quayle
Allen Iverson
caleb shnieder
i dont know keep looking
dolly partonDolly Parton
Pau Gasol