Since AW singers are a part of this topic, I figured I'd reiterate what I'd said about the consortium known as Jefferson Airplane/Jefferson Starship, then finally, Starship.
During the Summer of Love '67, the band Jefferson Airplane (started by Paul Kantner), arose on the lead vocals of Grace Slick, who in parallel with Janis Joplin, were considered the two primary American female rock vocalists of their generation. Ok, I'll concur with that statement ... at least from Airplane's "Surrealistic Pillow" till their breakup in the early 70s. Think of 'White Rabbit' and 'Someone to Love', if you want to recall the prior era radio classics.
Afterwards, once hippydom was in decline, the band needed to go along the lines of actually being a business of sorts. The subsequent band, Jefferson Starship, was re-imagined by Paul Kantner/Marty Balin and was pretty much "successful" (I guess in a 'Supertramp' West Coast 'Steely Dan' style of sorts

) throughout the 70s and into the early 80s, with Balin as the primary lead vocalist. Personally, I think that they're mediocre and have limited talents in terms of writing moving tracks but that's my own personal take on 'em. I regret having actually bought two of their albums from a yard sale
Throughout this time period, Grace Slick was kept around for "backup" vocals and the fact that for some reason, they needed to always showcase that she was around. Slick, however, was dealing with substance abuse issues and never lived up to her expectations of her role as America's first lady of rock. Thus, for the most part, Marty Balin, alongside Kantner, was holding up the business throughout the years, since the 60s had ended. His voice is the lead on all of Jefferson Starship's recordings. Grace was barely audible, even when she wasn't jacked up.
Well finally, when Grace did start singing in the limelight again, they re-formed into Starship and put out even cheesier music during the 80s as a Marty/Grace duet w/o Paul, since Kantner refused to have his legacy tarnished by pop trash. I guess she'd finally cleaned up her act, before it was too late for posterity sakes.
So while I don't really care for the above band and its history, I did recognize one thing. If Marty Balin was not holding down the fort for all those lean years, Grace Slick today would have been a forgotten derelict in a Methadone clinic, not a famous retired rock star. Her legacy from the 60s would have been completely erased, due to years of drug issues and the fact that on her own, she was mostly worthless without an entire organization around her. Once again, an ordinary "soprano" man, Marty Balin, along with the ring leader, Paul Kantner, made an AW look good for the history books.