#1

Griffpatch
Griffpatch is like pewdiepie of scratch, he makes insane and great games on his scratch,makes cool tutorials on his youtube. His projects are always the most viewed and liked(the #1 scratch project is his) and he has been doing this since 2013! Griffpatch is the goat and soul of youtube, and it's most important creator.
His projects:

Paper Minecraft
Just like normal minecraft! but in 2d, it's crazy how he basically made a game that took a whole company to make other than the graphics. it's the most viewed, liked, starred project that ever made the platform. It's iconic and I still remember playing it during the pandemic lol.

Appel
Set in the planet of Appelmoeshapje, appel is a platformer game very polished made entirely by griffpatch. It's like a full game that you would pay good money for, it even has a map maker and saving your progress!

Getting over it
Scratch version of Bennet Foddy's getting over it game with peak commentary by griffpatch and a crazy cool map with everything scratch in it. "It always seems impossible, until that is, it's done" - Griffpatch.
#2

Will Wam
Will wam is a OG scratcher. We all remember the ninja series and the bouncy ninja series. He actually made an app on ios and android I think on the bouncy ninja. Recently because he's in college now.
His projects:

The ninja
The ninja is a classic scratch game, it's a platformer where you have to learn to use different weapons to defeat enemies along the way, there are a lot of series to this (all the way to 5!).

The bouncy ninja
Now in the app store, the bouncy ninja is a spinoff of the ninja series, you bounce around defending yourself with surikens and katanas against enemy ninjas, the bouncy ninja is a well improved version of the bouncy ninja

Levi's quest
Levi's quesst is a rpg game about this dude called levi and his mission to overthrow this king. I don't wanna spoil anything, but there are a lot of characters and features, it takes like 30 mins to beat this game.
#3

Hobson TV
Hobson TV, another OG scratcher that started scratchin since I was like 3. He made tons of iconic scratch games and goofy games with his unique style of graphics and game making elements, you can instantly tell a game is made by him. And his animatiosn are really fun and interesting lol.
His projects:

Super Scratch bros
Super smash bros spinoff, but also not really? I mean the name gives it away but this indeed is a super smash bros spinoff, but it does have unique features, characters and gameplay style and creativity.

One man world
A single player sandbox rpg games that is very well developed, a bit like civilizations 1 and also really fun.

The jenkins - christmas special
Hobson tv is great at animations, and the jenkins series is probally his best one, he makes such fun animations and it brings it to life with humour