EU Material Suggestions That Enhance The Movies

I'm relatively new to the Star Wars EU, I've seen all the movies several times but have just started watching The Clone Wars. I've recently decided I want to get more into the extended universe of Star Wars but I'm not really interested in everything. The main things I'm interested in are books or comics that enhance the movies and/or TV Shows. I'm not really bothered If the books/comics are Legends or New Canon as long as they add context for the universe and I can head canon them into existing.

For example I'm not interested in the Yuuzhan Vong because I've been told it's not very good and It's also non canon, but I am interested in The X-Wing series because it fleshes out Wedge even if the story is non canon. Because Wedge is still is a canon character so I want to know more about him. Likewise I am interested in the Thrawn because he's an interesting villain who still exists in the new canon, despite Heir To The Empire being Non Canon.

The sort of things I'm looking to read are things that add to the movies like:

• Rogue One enhancing A New Hope because It shows how the rebels got the Death Star Plans
• The Darth Plagius book adding new context to the Phantom Menace
• The X Wing books adding Character depth to Wedge in the Original Trilogy

If the story is about anyone in the main series like Luke/Leia/Han/Obi-Wan or Anakin I'm not really interested because I already know their characters and they've been fleshed out. I'd be more interested in something about Qui-Gon Jin or Darth Maul for example.

If anyone has any suggestions please let me know but please specify if they are new or old canon!

I plan to read the X-Wing Series and the Thrawn Legends & New Canon books. And I've already read the Darth Bane & the Darth Plagius books.