Looks are not terribly important compared to musicianship. For example, Birgit Nilssen, Joan Sutherland, Alfred Cortot, and many, many more. But it surely doesn't hurt to have both talent and looks...and a flair for the dramatic, like Argerich, here smoldering even in one of her more relaxed poses :
I often think Juja Wang had Martha in mind when she created her own persona.
Then there are musicians whom one hopes are talented just because they are so dang good looking that it would be fun to watch them perform:
Stjepan Hauser
Luca Sulic
Hauser and Sulik have teamed up as a duo called 2Cellos and apparently appeared with Elton John and on Glee...and they have released 6 or so albums as a duo, playing mostly arrangements of popular music. Not my cuppa, but if number of plays on Spotify is any indication, they both do, together and separately, rather well playing lots of easy-listening schlock. Oh well. More power to them!