It may be hard for me because english isn't my first language but I'll try.
Yes I do have listen to those pop stars ( artist may be a little stretching ). Yes they do have influanced a lot of people but I don't think influanced, popularized goes hand in hand with moving music foward. Elvis Presley sang black music while being a white and he was dancing. All that was only for black people before him but he didn't create anything he just give it to the mass.
MJ if you remove music videos and his choreographies, there is not a lot left musicaly. Very normal pop music. People want to see him dance. It has nothing to do with actualy playing an instrument in a new way, or create something no one have ever listen to.
Prog existed before Pink Floyd, what they really bring new to the table is their ideas for live concert. Like color light, surround sound and of course the use of synthetizer. Same thing with Rush who created live play-back and loops but their music is a normal prog-rock song.
All that to say, all those people have bring something new to deliver their music ( you know, something to catch attention )but they didn't bring something new musicaly.
To explain it in a bassist point of view. There was a before and after Larry Graham, same thing with Stanley Clarke, Jaco and Micheal Manring. Those guys put something new to the table no one ever have done before them. Those are great exemple of moving music foward and not just for us bass players.
This is highly subjective.
I strongly disagree that "influencing" doesn't move music forward. That's sometimes the PRIME mover. I find, over the long arc of popular music, that influence and inspiration are the seeds that start the forests of other good things to come.
Also, guess what? Music transcends the conduit of sound and is, by nature, a highly visual medium. We consume music in such a large part via its visual manifestations, so I feel they go and in hand...almost inextricably.
Elvis probably inadvertently was the catalyst for the beginning hundreds, if not thousands, of bands and artists, and is on the influence list of multitudes of many greats over the decades. Doesn't matter if it's just popularizing something already extant, he pushed rock and roll forward, mate. In some regards, it wouldn't matter if his music was complete tripe; without him, so little would exist today. It doesn't matter if he was just co-opting black music and singing the bloody phone book! He was at the apex of an explosion. He also did something very specifically new, with his appropriation of gospel (via a "white" filter) into the rock and roll form. Think "Jordanaires"....completely blew everyone's mind back then.
MJ: those records influenced countless people, particularly Off the Wall and Thriller, and arguably Bad and Dangerous. Stunning arrangements, melodies, chordal movement that set a very high bar and pushed forward the whole genre of contemporary R&B in the late '70's and beyond. Not to mention the advancements in studio technology, drum programming, etc. Moving things forward. You can easily put MJ in that category with his/Quincy's production values alone. And the undeniable amalgam of dance/video/music was his to bring into the pop mainstream, even though it had its obvious roots in James Brown, Earth Wind and Fire, and many others. I put Prince on the same pedestal. They put R&B in the popular lexicon and set it up to be an undeniably powerful force across race/culture/national/continental divides.
Bowie: huge huge huge huge. Just take Low, Heroes & Lodger alone and you're done. So much more than that. If you don't see the ways with which he moved music forward, then you need to lock yourself into a room with some records.
Pink Floyd: doesn't matter if prog existed before, that's completely irrelevant. What about the complete acceptance of concept albums by the zeitgeist? That's Dark Side and The Wall. Amongst their many other achievements.
Moving music forward? To me, it means spawning something new by way of your own creations, inadvertently or otherwise, and adding dimension and depth to the field. Making an impact to a large spectrum of music listeners and music creators.
Jaco? Completely undeniable. Michael Manring? A bit less so, but unquestionably to a niche and probably a bit beyond. Unfortunately, I do believe (just my opinion) that listenership and visibility are a component to this, at least in terms of the scale that the artist is able to move things forward. Not an entirety of the thing...just a component of it, unfortunately or not.
So with this, my feeling is that you have to look pretty broadly. "Inventing" something or being strictly innovative, to me, is not necessarily a requirement in the "moving music forward" club. Nor is technical facility or sophistication a requirement in the least. Sometimes it's just positioning, or something catalytic like the Pistols. They moved the SH*T out of music foward, along w/ Ramones, Clash (arguably the biggest forward movers of music of the punk era) , Dead Boys, Slits, Pere Ubu, Wire, Damned, Germs, Fear, Black Flag, DK's, Stooges, Bad Brains, etc etc ad nauseam. And, for the record: really The Sonics and MC5, if we can get right down to it. But I digress.
Burial, Mogwai, Deerhoof? Sure! Influential, great, and moving it along into the future, all in unique ways. And many others of the current crop.
Anyone want to argue Madonna with me?
JMJ