While rewatching GT I've came to the conclusion that Gogeta SSJ4

Dragonball GT

NEW LR SSJ4 GOKU & VEGETA SSJ4 GOGETA INTRO, ACTIVE SKILLS, SUPER ATTACKS, COUNTER ATTACK + OSTS!

Goku's Final Goodbye (art by me) : r/dbz

DUHRAGON BALL — Dragon Ball GT 59

Was Gogeta a Super Saiyan God in GT? - Quora

Talk:Super Saiyan 2, Dragon Ball Wiki

Rykun_DSZ Art blog — Partners 🥕🥗 (part 1-3)

My visualised idea of LR Gogeta Blue : r/DBZDokkanBattle

In your opinion, what was the strongest enemy that Goku and his friends faced in Dragon Ball GT? - Quora

Dragon Ball Heroes is cool, but have you taken a moment to thank the LR Gods for existing? I have : r/DBZDokkanBattle

Proof! SS4 Gogeta can solo DBS - Dragon Ball Universe - Comic Vine

Who is stronger, SS4 Gogeta or SS Blue Gogeta? - Quora

DUHRAGON BALL — Dragon Ball GT 59