I agree with your list Efaulkk. Here are some of my own:

Mando v Boba

Mara v Ahsoka

TBB v Delta Squad

Anakin v Maul

Cal v Grand Inquisitor

Rex v Fordo

Ahsoka v Luke

Qui-Gon vs Grievous

Maul vs Talon

Starkiller vs Maul,

Asajj Ventress vs Starkiller

Fordo vs Rex

Rex vs Alpha 17

Fordo vs Alpha 17

Palpatine vs Revan

Anakin vs Vader

Vader vs Obi Wan (In his prime)

Pong Krell vs Grievous

Every Canon Inquisitor vs Starkiller

Death Star 1 vs Starkiller Base

Maulkiller vs Maul

Maul vs Vader

@RllyBadUsername All you gotta do is count how many planets the Death Star 1 and Starkiller base blew up and whichever one blew up the most planets wins 😁.

Maul vs Vader

Mace Windu vs Dooku

Maul vs Dooku

Grievous vs Maul (this has probably happened in Legends, but I’d rather see it on a screen)

Ahsoka vs Luke

And if we’re including ones that go heavily against the timeline, Yoda vs Vader.

@Master Coleman Fisto On the contrary Maul and Grievous actually had a few brief fight scenes in the canon Son of Dathomir comics. Maul and Dooku also had some amazing interactions in these comics.

Mace Windu and Dooku had a fight scene in the Obsession legends comics. They’re both really awesome comics!

^ Yeah, I had those in mind, but neither of them really lasted long enough to bear a verdict over who the better duelist is. Which is what I’d really like to get a canon answer to.

^That’s very true sadly. These interactions and fight scenes while great, were too brief to really be called lightsaber duels.