Yea I'm actually downplaying Loki. Objectively looking at it that's exactly what this implies. I'm factoring in Oda taking it too far thanks to narrative and flashback context. My point is that you can't possibly push it lower than Loki > Harald, Xebec, Roger, Garp, WB etc.
His floor has been established above Harald, everything in the story screams that. Oda has put in all this effort to show Harald was around the top of this verse already. So being above a top 1 candidate by default puts Loki at the top of the verse. Not necessarily God tier, though again that's just me being conservative because even I can't believe Oda is going that far, but there's a limit to how far we can take this by being conservative. That limit is he is not on a tier of his own but he is at the top of the tier above the rest.
The question rn should be how much stronger is he. God tier has merit ofcourse given what he did. He's the only character this entire flashback who moved Imu. Magic fruit, haki, doesn't matter. The eos characters were always going to have hax. We've known about Teach's conditional hax for over 2 decades. We just got introduced to Luffy's in Wano, and now we have Loki.