I know there's much talk about Steph, Tatum, Brown & Klay because they're the stars, but TBH players like that are going to be hot/cold on any given night.
The one player that makes us a matchup challenge is actually Al Horford. His style is the perfect modern Big. That's not to say that he's the best big in the league, but it's to say that his specific toolset is ideal for 2022. He's quick, he can pass/dribble/shoot, he can shoot the 3, he can guard 1-5. If someone like Horford was entering the NBA Draft, they'd be very desirable IMO.
On GSW you have Draymond, who is a better defender, but lacks the 3 point shot. This allows whoever is guarding Draymond to cheat off him. Cheating on defense is extremely valuable when you've got a couple lights out 3 point shooters to defend. For example, it allows for traps on switches because the cheater can cover the open person if the trap fails.
The other thing is that not all defenses are created equally. While GSW has gotten a reputation for being a top defensive team, a defense is only as strong as the weakest defender. If you have a weakness on your defense, the offense will exploit it. We saw quite a bit of it, but the Celtics should be targeting Curry as their weakest defender and most ROI for defensive fouls. Either Tatum or JB melt him in a 1 on 1 forcing doubles / fouls and theoretically leading to an open 3 somewhere.