Some may debate these, but whatever (sorry, too lazy to look up their actual Twitter handles, but you should be able to find them pretty easily):
AJ Haefele, Nathan Rudolph, Evan Rawal (aka "The Mars Volchenkov" on here), are the DNVR crew. Drew Creasman is their Rockies beat writer and has become a new Avs fan this season. It's fun to get his perspective as well.
Aarif Dean and Ryan Boulding work for Mile High Sports.
Ryan S. Clark is probably the best writer out there covering the Avs. He works for The Athletic.
Mike Chambers still covers the Avs on behalf of the Denver Post. I forget who else does.
Rick Sadowski, I believe, has covered the Avs for the 2nd-longest amount of time, behind Adrian Dater. It's a shame he's been reduced to NHL.com spots and Hockeybuzz stuff since the Rocky Mountain News, I wish someone would find him a regular gig. He seemed heartbroken when the Rocky Mountain News was possibly coming back a few years ago and whatever initial plans to do so were quickly scuttled.
Chris Miceli runs the "Locked On Avalanche" podcast (and he has an account on here as well). Tigervixxxen is here from time to time, she and the Burgundy Rainbow/Burgundy Radio crew do some great work delving into prospects and other areas you might not normally see elsewhere.
And of course, there are Terry Frei and Adrian Dater, who both lost their gigs at Post under rather ignominious circumstances. I still follow both, others can do what they will.
Jay Vean and his compatriot Tapeleg run the Avs fan podcast and created the whole #AvsTwitterPsychic hashtag which became a focal point of controversy lately.
Cheryl (Beachiesnowgirl is her Twitter handle) used to do stuff for Mile High Hockey.
Mile High Hockey is the SB Nation Avs site, it kinda fell off in recent years due to a huge fallout that resulted in a lot of contributors leaving and starting Burgundy Rainbow. But it's still around, and the Scott MacDonald guy who does content for them now seems like an a'ight guy.
Mile High Sticking is another site, I personally unfollowed them because I didn't care for their content. Again, do what you will.