My personal canon are:
- Classic LucasArts games that aren’t based on the PT up to Jedi Academy (so X-Wing series, Dark Forces series, KOTOR I-II, Rebel Assault I-II etc.)
- Al Williamson’s classic comics (B&W + Marvel)
- and as an epilogue but more of an addon than actual canon maybe, the Thrawn trilogy
Probably forgot something but basically most good stuff surrounding the OT without any PT or Disney tarnishing.