Who's the best out of all these? GLEE.?

Mercedes is the best singer hands down! While Rachel, Blaine, Santana are extremely talented singers. Mercedes not only has the widest vocal range, but she can hit the highest notes too. Most people think Rachel can because she sounds so ... high pitched. Anyways Mercedes is the most versatile as well. You see singing clics, to rock, to show tunes, to RnB - she's divalicious! It's a shame Rachel gets more solos.