Let’s get one thing out of the way from the start: I have neither read nor seen any of the Harry Potter stuff. Others may disagree, but I do not consider this a loss.
So it strikes me as a bit of shame that so many people, especially younger audiences, are probably more familiar with the late Michael’s Gambon’s role as Dumbledore in the Potter films than any of his other work.
They may be unaware that Gambon was a highly regarded theatre actor, then an award-winning TV favourite, then an art-house film star, before he became a Hollywood celebrity and national treasure. He developed a varied and acclaimed acting biography spanning five decades at least.