While Goku and Vegeta are the faces of Super Saiyan God in Dragon Ball Super, they're not the only Saiyans who have unlocked the God form.
Dragon Ball's strongest Saiyan fusions are on another level, combining the raw natural talent every Saiyan has with fusion's broken power multiplier.
Only a few transformations in Dragon Ball Super are stronger than Legendary Super Saiyan, and even then, just barely.
The canon version of Super Saiyan 4 can't compete with God forms, but Dragon Ball GT's SSJ4 is borderline overpowered.