OmniSpectra
The protagonist's power is very far from Super Buu's power, Super Buu was an equivalent to Gotenks SSJ3 and Gotenks base. After training in the time room, he was stronger than Goku and Vegeta at their maximum powers.
He is undoubtedly stronger than both at maximum, however, he would also need to be transforming for that, and not in the base form as you said lol.
Aiko7w7:And lastly, they trained fused, so the one who took everything was Gotenks but not Goten and Trunks, and to finish, the metamoru fusion not only adds their maximum powers but they also have a plus or as Gogeta said "they are significantly higher"