• Orange Cassidy vs PAC from AEW Revolution 2020 - Orange Cassidy overall is a fantastic gateway because his gimmick is fun in the wink-wink way that gets people past the "it's fake" barrier, but then when he takes it up a notch it's easy to cheer for him and it's so effective paired against someone no nonsense like PAC. This match does a really good job in establishing OC's gimmick and sets you up for wanting to see more.
• Will Ospreay vs Ricochet from NJPW Best of the Super Juniors 2016 - This match is awesome, it's one of the matches sold me on NJPW. The Junior Heavyweight style is high action and fast paced, it makes for a can't look away watch.
• The Revival vs #DIY from NXT Takeover Toronto 2018 - This one requires a watcher that's willing to pay attention but it's a GOATed tag team match if they do, no notes.
• [Bryan Danielson vs Kenny Omega from AEW Grand Slam 2021 (no link 😔 ) - Another awesome athleticism match but in a different way to Ospreay/Ricochet. This is a fantastic showcase of two different styles done by two guys that mesh incredibly well together.

I could probably come up with more but generally I think any newbie recommendation needs a few key things:

• a hot crowd to keep the vibe up
• some sort of distinct attraction, e.g. a crazy spot, a match gimmick, an appealing wrestler gimmick, etc
• not too lore heavy. Recommending someone's first match be Omega/Okada 3 or Omega and Hangman vs the Bucks or something is waaaay too much too fast
• knowing your audience. Something my partner has taught me is that if you know what someone's type is you can find a wrestler that fits and they will be almost certainly into them in some capacity