Already made a reply about this in an earlier thread. Speaking of SCP/MGE crossover, have you read these fanfictions?
The Karcist and the Lord. It's not directly related to the Foundation, but rather to one of their major enemies, the Nälkä/Sarkics. Expect body horror, gruesome brutality, deicide, and extreme savagery. You're also gonna need some lore research when you read this.
SCP: Stranded. An MTF operative get Isekai'ed. 'Nuff said. It's currently in hiatus, but it's a good read that doesn't wank the protagonist or the Monsters too much.