My memory is so shot I don't remember half the matches on these shows, lol. I'll just list some of my favorites:
Nitro: Dean melanko vs Ray mysterio, both matches. Benoit vs Hitman, Jericho vs Juventud Guerrera, raven vs Bigelow vs Sandman hardcore match
RAW: Jeff Hardy vs Undertaker ladder match. John Cena vs Shawn michaels. Zain vs Owen's (better than their ppv matches imo). Recently, Seth vs Ziggler. I don't mind their long Feud at all because those 2 are elite workers and watching them go head to head is art
Smackdown : Ironman match Kurt Angle vs Brock Lesnar, Rey mysterio vs John Morrison IC title match, CM Punk vs Jeff Hardy, CM punk vs Ziggler, Eddie Guerrero vs Edge, Edge vs Benoit
Japan: All of the Kenny Omega vs Okada/Nieto matches, Benoit vs Thunder Liger matches
ECW: any Rob van Dam ppv match. Him vs Lance Storm, Jerry Lynn, sabu, RVD/Sabu vs Hayabusa/Shinzaki at heatwave 98 (criminally underrated tag match), mike awesome vs Mosato Tanaka, mike awesome vs Spike Dudley, Mosato Tanaka vs Balls mahoney (nobody can eat chairshots like those 2 did) elimininators vs Dudley Boyz, raven vs Tommy dreamer. 3 way dance Funk/Sabu/Douglas
NXT: every takeover has an instant classic or 2 : Pete dunne vs Tyler Bate, Bayley vs Sasha, Bayley vs Asuka, Nakamura vs Zayn, gargano/Ciampa vs AOP ladder match, Allister Black vs Adam Cole, Almas vs Gargano, all Gargano vs Ciampa matches, lorcan/Burch vs Strong /O'Reilly, 6 man ladder match, Ricochet vs velveteen. Disclaimer : was in attendance at both takeover Chicagos, but not many would argue against naming the aforementioned matches from those shows
NXT TV: Allister Black vs O'Reilly and black vs Fish (both were pre undisputed era), Lorcan vs Birch (both matches)
WCW PPV: melanko vs Benoit road wild 96, Guerrero vs Mysterio, Raven vs Jericho, Jericho vs Melanko, and can't forget the outsiders match where the nWo was born. That single handedly changed wrestling and made it popular again
TNA: a handful of ultimate X matches from the early years (they were all great), AJ vs Samoa Joe, AJ vs Kurt Angle, monsters ball match Bound for glory 2008 Dudleys/LAX/Morgan and abyss (I'm a bit biased on this one. Was there sitting 4 rows away from the ring

)
WWF(E) ppvs: Michael's vs Taker part 1, Michael's vs Angle at WM21 (why this one doesn't get talked about more is beyond me) both Michael's vs Razor ladder matches. Any ladder match featuring Hardys/Edge&christian/Dudleys, cm punk vs John Cena (maybe biased again due to being there), Hardys vs the bar Ironman match, Cena vs Batista summerslam 2008 (I'm sure I'm in the minority but I felt it was a damn good back and forth match that kept me guessing. Don't go by the stereotype that these 2 can't wrestle) , CM punk vs Brock Lesnar, hogan vs Rock, RVD vs Jeff Hardy
ROH: they used to come out to Chicago Ridge all the time so I've seen many great matches, too many to count. Briscoes vs American Wolves, Aries vs Jacobs, Tyler Black vs Chris Hero, Tyler Black vs Roderick strong, Kings of wrestling(cesaro and Chris Hero) vs all night express (Kenny king and Rhett Titus), Kevin Steen vs El generico, Samoa Joe vs Bryan Danielson to name a few
Lucha underground : Sami Callihan vs Killshot, Callihan vs Mil muertes, Ricochet vs Pentagon. Im sure there may have been plenty of even better ones, but admittedly I haven't seen a whole lot of Lucha Underground. But those matches were supurb