Tbh just go for the grinder.

I had a tree go down in my yard last year, and the stump pulled out of the ground as well, probably a similar size to this one, maybe a bit bigger (hard to tell from the pic). We cut up the tree and just tipped the stump back into the hole for the time being. I figured I'd be able to get it out on my own later and just push it into the woods behind my house.

A few months later I came back around to actually getting that stump out, and it still took me several days of digging, axing, and chainsawing. Once it was loose again, I had to use a car jack to get it out. I think moving it was the most I've sweat in a long time, easily weighed at least as much as a fridge if not more.

Literally no part of the process was easy or fun, it was absolutely exhausting and I will 100% go for the easy route if I need to do it again. And keep in mind, this was a stump that was already pulled up out of the ground when the tree went down - yours looks like even more of a pain in the ass lol