This actually took me a quite a while to decide - I admire a lot of actors and actresses but usually for their style I think - but for their acting, I think I would probably say Johnny Depp and maybe Robert Carlyle as well
In a debate between Bill Mury or Jony Depth I like Mury because he did good in ghost busters and Zombieland and Jony because he did hell of good as Jack Sparrow and In Rango