I expected this to be a challenge and so far, no disappointment.
I started on the upper panel (crease 2) by looking for obvious deformation along the "boundaries" or "anchors" (rigid folds that constrain the panel). The upper and rear edges and the body line had nothing obvious. But the edge of the bumper cut-out was clearly pushed inward a lot.
I decided to find out if pushing that edge out would be a magic answer. I struck out on finding a rental porta-power ram so I improvised. I used a couple 2x2s to get a lot of leverage outward. This worked pretty well, pushing to deflect the edge and hammering above it. The vertical post was about 4 ft long - more than enough to deflect the panel.
I didn't get the edge located great, nor did I get the creases flattened but it's a start. The buckle that oil cans (circled) was unfortunately still oil canning so I ran the shrinking disc around to see if that would help.
No magic.
I concluded I will need to try pulling to the rear so bit the bullet and ordered a clamp and come-along.
Can only get better if I don't over-pull it.
He said.