How can I fix the mounting of these outlets in this box that is taller than the outlet?
All your listed options will work.

Folded edge covers always fit a bit wonky, unfortunately they don't make a crushed corner version for 4-11/16&quot; boxes
Gap between faceplate and mud ring that looks incorrect, possible hazard
A lot of work, 4.5&quot; face plate will extend past edge of box, less hazard
A lot of work, will look the best, possible damage to sheetrock that can be complicated to repair

5th option? Really option 2.1, maybe a flat device ring, a regular sized 4.5&quot; faceplate will mount flush against device ring and be smaller than existing 4 11/16&quot; box. Probably most expensive fix.