In the Future Trunks Saga of Super, Vegeta mentioned that "Saiyans have no limits." I'm not sure what this scales to, but since he simply mentioned Saiyans, I assume he meant base Saiyans. "No limits" = "unlimited" = "infinite," so base Goku and Vegeta after that saga, and anyone who scales from their base forms, are High Universe level.
Since their Super Saiyan forms are multipliers, that would be multiple infinite stacked on top of each other which, as TurboTriangle said, is qualifiable for Universe level+. You could also argue that since there are at least fifty infinites (since most sources state Super Saiyan has a fifty-times base mutliplier), anyone who scales from FTS Super Saiyan Goku and Vegeta are Low Multiverse level. The multiplier for Super Saiyan God is unknown, but it should at least be above two-thousand and five-hundred times base, since Goku mentioned Vegito wouldn't be enough to fight Beerus, with the Super Exciting Guide stating Potara Fusion is an A*B multiplier (Goku and Vegeta's base power levels multiplied by Super Saiyan), pushing them up to Multiverse level with Super Saiyan God and Super Saiyan Blue.
This is also consistent with the fact that Infinite Zamasu was beginning to merge with the rest of the Multiverse, which Trunks said could have timelines created within it based on even the slightest action (that would be an innumberable but not infinite amount of spacetime continua), which is Multiverse level. And, there is Jiren, who even while incalculably suppressed, managed to make Beerus sweat and freak out, who alongside Champa can destroy multiple universes, simply by clashing, which is Universe level+. He was also stated to be more powerful than Infinite Zamasu by multiple sources (including in-universe statements), who is at least Universe level+ for merging with a universe, but Multiverse level for the things mentioned above. Even after Jiren reached his full power, with the margin between his 119 showing and his full power being so vast that it makes his 119 showing look infinitesimal, a beaten down and exhausted Goku managed to take him head-on without instantly losing while in Super Saiyan Blue.
But, if you really wanna get wild, you could just claim that the World of Void being described as infinite while the Multiverse isn't would make anyone who scales to God Toppo Multiverse level+ since he undid an ability that affected the entire World of Void.