Very interesting

I agree with about half the list.

Going to think on this

Overall it seems a fairly competent list. Glaring omissions for me would be Jamie Hernandez and Sean Phillips.

Glaring entries...Frank Miller's best days were behind him by 1993.

I could quibble about others. I dislike Greg Capullo's work. There are a couple I'm not super familiar with. And while I don't like Jim Lee's work he certainly belongs.

Which Adams?  Because Neal Adams hasn't done anything note-worthy, much less readable in decades.  The only person you mentioned I'd even consider putting on that list over any of the people there is Alex Ross.  And I don't even like his work.  

On the artist list, yeah I can agree with some of it. Miller shouldn't be on it. I could debate about Quitely too, for me his art is hit or miss sometimes and I think there are more recent artists that I would put ahead of him (Francis Manapul comes to immediately to mind).

Also, I don't get the love for Chris Ware. I've read some of his graphic work that I've borrowed from the local library but I just didn't get the story or themes involved with the art.

As for the series list, how is Sandman not on that list??

Here's what SyFy says about their list :

To celebrate the last 25 years in comics, we're looking back at the greatest comic book artists from the last quarter-century. Before anyone cries outrage on why George Perez or Walt Simonson are not on this list, despite continuing to produce amazing work, please remember that we're just talking about seminal works from the last 25 years, and the legendary works we are highlighting only go back to 1992.

We based our criteria on a balance of

unique creativity,

distinct or influential style,

longevity,

and

impact,

as opposed to

quantity

or

how big the profile was of said project(s).

Their interior artwork had to be their biggest contribution (even though their cover art may be depicted below or be fondly celebrated) during this era, and it must inspire, evoke emotion, and/or transport the reader to a far-off vivid world and keep the reader dreaming when they close the book. Now, without further ado ...

Emphasis mine, so artists known mostly as cover artists, like say, J. Scott Campbell, wouldn't carry as much weight in this instance.

Still working on my own list, which I'll eventually post.

Perez did JLA/Avengers, and Busiek's Avengers run... he did some stuff with Waid at DC, and has a creator owned series going now, which I didn't like but is pretty .

I had in my head Neal Adams had done 90s stuff.. that was clearly incorrect.

Byrne's done plenty... Wonder Woman... the retro stuff (X-Men Hidden Years, and Spider-Man Chapter One).. Next Men... his more recent indy minis, etc.

Some of the people on that list I had to look up to even see what the did, and a few are there mostly just for one series.

None of that work by Byrne was remotely innovative or interesting.  Some of it (Wonder Woman, Spider-Man Chapter One) was embarrassingly inept.  

While Perez's work on Avengers was nice, again, there was nothing about it that built on or was more interesting than what he did in the 70s and 80s.  

One interesting innovative series can be significantly more influential and "greater" than doing the same thing you've done for 30 years ad nauseaum.