Is John Lennon and Paul McCartney best composer?  

honestly, dandit, john lennon and paul mccartney, are really very good composers. they just deserve the honors that are given them.

there are plenty of excellent composers around us, my friend. they deserve to be acknowledged, all of them. now, if these two beatles people are given these honors, then, it is a justifiable act since they have really done so much for the music industry.

If not the best, then they are the Greatest. The way they write songs is very unique. They deserve it. Paul and John are like Yin and Yangm, the combination of angst and bright side of everything.

All these " best of " are just scam. People have to pay big money to be in the hit parade of Rolling Stone.