All the theoretical knowledge in the world about music will not make you a good pianist unless you practice.
She was a good pianist, as well, and he enjoyed listening to her play.
He loved tennis music and was a good pianist.
In those days I wasn't a very good pianist.
He remembers his mother as "a good pianist with wonderful touch in her piano playing".
Lots of practice is needed to become a good pianist.
He was a very good pianist and the piano parts are often quite difficult.
When there's a good pianist available, there is music to dine by.
He is also a good pianist, looking into a musical college after graduating high school.
Someone might be a very good amateur pianist, possibly better than some professionals.