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
Dan Quayle
Tinie Tempah
ray Lewis
Sacher, Louis
juan horward
Emmit Smith
Allen Iverson
caleb shnieder
i dont know keep looking
Pau Gasol
dolly partonDolly Parton