Many other bands and solo artists are masters of their craft. Being a master of your craft does not make you the very best at it.

Music is inherently subjective, thus mastery of music is inherently subjective, thus it is meaningless to say that any musician is the "best" or has "mastery".

There are many other bands that fit the same criteria. Rush was inspired by Yes, for example, a group with many more members than Rush, yet still just about all have been masters of their craft, producing countless successful solo albums and even writing film scores with their talents.

What about the New York Philharmonic? Or Weather Report? It's nearly impossible to compare technical mastery between genres like this.

Ozzie is God