The supremely talented P. Ravishankar,
For most part of his career till 2011, he made more name as a dubbing artist than an actor. He has dubbed for over 2600 south films - Tamil, Telugu & Kannada. He even turned director for a Kannada film titled Durgi which became super hit with Malashri in the lead. Later when it was remade to Telugu as Narasimhudu as a male lead film with NTR Jr, he was first insulted by being made as an assistant director to the remake of his own super hit film.
Then, his voice for Sonu Sood in Arundhati earned Sonu a lot of awards. A career in South. He was once again insulted during Varudu, an Allu Arjun film where he was called on the set. He thought finally his career as an actor is set with him playing villain in a big Allu Arjun film but he was asked to come to the sets to train Tamil Actor Arya on how to act, mannerisms so that he can be more presentable to Telugu audience.
Finally in 2011, he played the main villain in Kemepegowda, Kannada remake of Singam. Since then he is among the most successful actor in South India. Almost a replacement to Prakash Raj as he is most sought out actor to play villain, supporting actor & even comedic villain. The stuff Prakash Raj made a career out off.
To speak of his range as dubbing artist, this is just an example
He dubbed for multiple characters in a single movie. Those characters were part of the same scene too.
In Allu Arjun's Race Gurram (2014), Ravishankar dubbed for 3 actors - Ravi Kishan (main villain), Mukesh Rishi (villain's dad) & Shaam (who played Allu Arjun's cop brother).
In Mahesh Babu's Athadu (2005), Ravishankar had dubbed for 3 actors - Sonu Sood (Main Villain), Rahul Dev & Charan Raj.