Current behind screen person

In the era of heros like M.G.R and Sivaji, a director K.Balachandar (and Bharati Rajaalso) was setting trends as a director launching Kamal and Rajini. In era of Kamal and Rajini it was Manirathnam who used these heros too but was a pull factor even behind screens. In era of Ajith and Vijay who would be the one director who will last long with a career as these heros you reckon? I loved Iraivi and so Santhosh Subramanian and despite hating Petai laud him for trying Rajini and mainstream. Who will outlast these heros as directors behind the screens?