The most complete feature of a Tamil actor named Rajkumar is the second list (Gopalakrishnan’s son). If you confirm the exact Rajkumar, I can provide a fully verified, sortable table with year, director, music, and box office.

Dr. Rajkumar was primarily a Kannada icon. His Tamil films were dubbed or bilinguals. ✅ Option 2: Tamil actor Rajkumar (son of Tamil director K. S. Gopalakrishnan) This Rajkumar acted as a lead in several Tamil films in the 1990s–2000s.

But since you specifically asked for — it most likely refers to Dr. Rajkumar (Kannada legend) who acted in Tamil films early in his career, or the less-known Tamil actor Rajkumar. I'll provide both possibilities to be fully accurate. ✅ Option 1: Dr. Rajkumar (Kannada legend) – Tamil filmography Dr. Rajkumar acted in a handful of Tamil films during the 1950s–1960s.