I’m not really someone who obsesses over an “official canon”, but I still have a set of favorite stories which I more or less organize in my own personal “head-canon”. As a result I have a movie head-canon and a EU/Legends head-canon.

My weird EU/Legends based head-canon;

Way of the Wookiee
(Star Wars)
The Day After the Death Star
Marvel Star Wars #11-15 & 17-37.
The Faithful Wookiee
The Weapons Master
Dark Forces
(ESB)
Droid World
Shadows of the Empire
(ROTJ)
Dark Forces II: Jedi Knight
Thrawn Trilogy
Dark Empire 1
Jedi Knight II: Jedi Outcast

(There’s more to it than this, but these are my favorite Legends stories that I could remember at the top of my head.)

My very unoriginal cinematic head-canon;

SW (unaltered )
ESB (unaltered)
ROTJ (unaltered)
TFA