Maybe I'm just the old head around here but why is there a need to draw a line between Lead/Rhythm guitarist???
Maybe people just don't understand (or remember) how Jimi Hendrix and Jimmy Page played? Was SRV a rhythm or lead guitar player???
Can you even BE a lead guitarist without mastering Rhythm guitar???? Beats the crap out of me!
That being said . . . It took me 3/4 of my life so far to find a guitar player who, when we met, told me he has no need or intention of playing solos. He is the rhythm guitarist period. He's currently working with me on my recording project and I do have to say, he's an inspiration. 100% team player who only wants to contribute to the song. No ego, no competition. He finds a way to only play stuff that adds to the tune. I don’t know why he loves playing this way but I do have to admit . . . I love that he does and we will be playing together for many years to come.