So i watched clone wars again and here are some suggestions that are actually not in the Game:
Nute gunray ship
Commander gree
Jucasta nu
Ropal
Satin
Pre vizla
Adi galia
Windu fighter ship
Aquadroids
Quinlan vos
Jabba, zero
Hondo ship
Padme ship
Count Doku ship
Bail organa
Ventress ship
Evan piel
Pong krell
Satin
General kalani
Tippli
Tippla
Admiral trench
Sifo dias +ship
Pikes
General plo
Yoda ship
Replies
General Pryde
Zorii Bliss
Snoke
DJ
Maz Kanata
Praetorian Guard
Knights of Ren:
Vicrul, Cardo, Ushar, Trudgen, Kuruk, and Ap'lek
Cave Trooper
Nova Trooper
Sea Trooper
Sand Trooper
Mine Trooper
Swamp Trooper
Mimban Trooper
Jump Trooper
Scout Trooper
Flame Trooper
Shock Trooper
Inquisitor Trooper
Shadow Trooper
Mud Trooper
Zuckuss
4-Lom
Hondo
1. Luke Skywalker's X-Wing
Crew: Commander Luke Skywalker, R2-D2
2. Havoc Marauder
Crew: Hunter, Wrecker, Tech
3. Yoda's Jedi Starfighter
Crew: Grand Master Yoda
4. Tantive IV
Crew: Princess Leia
5. Punishing One
Crew: Dengar
6. Rogue Shadow
Crew: Starkiller
7. Rebel/Resistance A-Wings
Crew: None
8. B-Wing
Crew: None
9. TIE Dagger
Crew: Sith Trooper
10. Givinex-class Fanblade Starfighter
Crew: Asajj Ventress
11. Iden Versio's TIE Fighter
Crew: Iden Versio
12. Fury-class Interceptor
Crew: Sith Empire Trooper
13. Geonosian Solar Sailor
Crew: Count Dooku
14. Mouldy Crow
Crew: Kyle Katarn
15. Twilight
Crew: General Skywalker
16. Nubian Yacht
Crew: Padme Amidala, C-3PO
17. Sentinel-class Shuttle
Crew: Stormtrooper
18. Krennic's Shuttle
Crew: Director Krennic
19. Inquisitor's TIE Advanced
Crew: Grand Inquisitor
20. HMP Droid Gunship
Crew: None
21. N1 Naboo Starfighter
Crew: Captain Panaka
22. Aayla Secura's Eta-2 Interceptor
Crew: Aayla Secura
23. Invincible (Capital Ship)
Crew: Admiral Trench
24. Endar Spire (Capital Ship)
Crew: Bastila Shan
25. Ravager (Capital Ship)
Crew: Darth Nihilus
Crew: Dengar
That will be great to use with the Executor!