The Drifter is a great narrative, but the puzzles are just OK.

Wadjet Eye developed and published games have quite a few great games. Blackwell series is awesome (I would've wanted a different ending for the series, but the games are great), Resonance, Unavowed, Primordia, Gemini Rue and Technobabylon are all great as well.

Kathy Rain is also good (haven't played the second one).

I doubt, though, that any are better than Curse of Monkey Island, Grim Fandango (which is arguably held back by its 3d graphics and controls) or The Longest Journey.

I don't know if you can call any point&click game objectively 'good': they all suffer from the problem of the player getting occasionally stuck after missing a hint or failing to make a deduction. Besides, they are heavily story-based which makes liking them a matter of personal taste.

Thimbleweed Park was a fine game with a very disappointing ending, as was RTMI sadly. I was also fine with Return's more "streamlined" game approach, but I would've liked the games to have a real storyline with a real ending instead of some kind of meta story where the journey is more important or whatever. I just lose interest almost immediately... I wanted to play Thimbleweed Park's free "mini-game" that he released during Covid, but just couldn't make myself play it due to the ending of Thimbleweed Park.

Sadly, I had a somewhat similar disappointing experience with Dreamfall: Chapters (although it was a worse game than Gilbert's games), as The Longest Journey is, IMO, one of the best adventure games ever. I played it as the episodes were released, and wanted to get back to it as they improved many things post-completion, but the could never force myself to do it.

There are still adventure games that are great that are released today by other people though.

Yeah it's a real pity what happened to TLJ. Both the first game and Dreamfall were fantastic in different ways. Though Chapters... yeah, could not get into that one at all.

You don't need a GOOD proof, just A proof.