<p>
In addition to being a talented pianist and composer, B</p>
<p>
In addition to being a talented pianist and composer, B</p>
<p>There’s no error because “having been” means that he stopped being a talent pianist and composer before he became a musicologist.</p>
<p>I agree with silver</p>
<p>“being” is just like any other verb and it can be used correctly</p>