Mara Jade, she carried it the longest.
Appailana, because her actor, Keisha Castle-Hughes played Mary in The Nativity Story, one of my top twelve Christmas movies. And I'm atheist.
I'd like to see the original Barris Offee from the MedStar duology again, rather than Filoni's doppelganger. Same with the original Ventress.
Koon and Secura were the only one of these killed under Order 66. Tiin, Kolar and Fisto were killed by Palpatine before the order was given, while Ti wasn't killed for many years. Additionally, the assault on the Jedi Temple was not part of Order 66. It was Operation Knightfall, a specific mission carried out by the 501st Legion. Order 66 was one of several publicly known contingency orders to be carried out by the clone commanders in the field.
The Thrawn Trilogy, featuring the introduction of the iconic Luke/Mara/R2-D2 trio.
Obi-Wan Kenobi and Siri Tachi. They were the first fictional couple I ever got invested in, after I'd only read Jedi Apprentice 9. This was before Secrets of the Jedi was even published, and I didn't find out about it for a while. I don't know whether Watson planned them as a couple from the start, or came up with it after noticing their chemistry, but either way they have a very organic feel.
If you want to know about his Jedi training, read the Jedi Quest books.
I don't know about sacrificing Grievous, but giving Dooku more screen time is the right option. Thankfully the novelization greatly expands on the Dooku, adds one of him talking to Sidious before the Jedi arrive, and even gives him a second-person POV section for his death.
This looks more like Filmation to me, he looks the characters on Star Trek: The Animated Series.
Revenge of the Sith. The second best movie, and its novelization is the best Star Wars work.
I agree that Knight Anakin is number two because of the same stories.
Padawan Anakin, particularly his appearances in Jedi Quest and Republic.
The Empire Strikes Back, but my favorite work is the Revenge of the Sith novelization.
Republic is not a novel, it's a comic series that ran from 1998-2005. Along with its spinoffs it was the most important prequel-era work after the films. And I don't like the idea that novel/comic characters are automatically lesser than film characters.
Aayla was not a minor character. She was the co-lead of Republic with Quinlan Vos. She originated there, and Lucas liked an artwork of her enough to add her to Attack of the Clones.
Did Billaba die during Order 66? It's certainly possible, she had been comatose for two and a half years and the Republic would have known where she was, but I don't know if it was ever confirmed.
Even Piell. He wasn't even supposed to die during the Clone Wars, he died after the Declaration of Empire.
Because the 2008 show was made before the reboot, it is officially considered part of both continuities, despite not remotely fitting into the classic saga. It's best to just treat it as Infinities.
And seeing as it's all fiction, any work is only as canon as you decide it is. Don't let corporate bigwigs decide how you partake in fiction.
Dooku. Maul was boring as hell, Ventress is a far weaker character than the original Ventress, and the rest were nothingburgers. Really, Dooku and Obi-Wan were pretty much the only characters on the 2008 show who were actually in character.
Obi-Wan, as he was actually in character, unlike the other movie characters.