In terms of who wins:
Oneness Jacen Solo vs. 100 Palpatines - imo Jacen in galaxy-breaking powerfest; it's the Force itself vs. hundred of Dark Side nature essences lol
Death Squadron vs. every ship in the final battle of KotOR - Death Squadron in a stomp insanely beautiful visually
TUF Luke vs. DN Luke vs. LotF Luke vs. FotJ Luke - FotJ wins automatically, even if TUF Luke may be the most dedicated fighter in the mental prime, FotJ Luke knows every smallest movement TUF Luke can do, so the latest version wins by default.
Terror from Beyond vs. SWTOR Vitiate - honestly dunno, insane view though lol.
Anakin Skywalker in X-wing solo vs. Death Star II (shields down) guarded by imperial fleet at Endor - Death Star, unless Anakin is in StealthX, then 1/10 goes to Anakin
Luke vs. two Caedus's - Luke, epic fight
Sidious vs. Valkorion (sorcery battle) - Sidious, but man, Valk really makes him work for it, while Sidious is >> Valk in Force power and mastery overall clearly, he's far more sorcery-oriented than Sidious
PT Republic vs. Vong-era Galactic Alliance - Alliance, insane fight tho; Alliance has far superior tech, but PT Republic has clones and insane numbers; unless it's pre-Clone Wars Republic, then Alliance murderstomps in few days
Ziost Vitiate vs. Post-Nathema Vitiate - Ziost
3 YVHs vs. Slayer - Slayer
Millenium Falcon vs. Slave One - Falcon wins by default
501st vs. equivalent number of arc troopers - ARC
Darth Revan vs. Exar Kun - dunno
Darth Malgus vs. Exar Kun - dunno
ANH Obi Wan vs. RotS Obi Wan (Force battle) - ANH
Pellaeon class star destroyer vs. Executor super star destroyer - Executor is just on another scale of size and armament, wins easily
Kyle Katarn vs. TPM Maul - Kyle
Full Power Abeloth vs. Valley of the Jedi Jerec - full power Abeloth wins in a blink against anybody sans The Ones, Yuuzhan'tar and Bedlams
Droideka vs. Jedi Knight - Droideka
Lord Dramath vs. Shaak Ti - Shaak Ti
Imperial Starfleet vs. Death Star I - not sure
Marka Ragnos vs. The Hidden One - Hidden One