Morning, Hope this helps, In my 30+ yrs, We have moved several ovens and every time I think Oh No this cant be done, Well yes it can someone put them there.
If you can afford it call the local movers, They will give you a quote. Of course as a young buck, I could move anything and could not afford to pay movers. Ok here goes,Bring pinch bars, 4x4’s and dollies. Remove anything you can( to lighten the load) As for the top oven get it loose turn it sideways and simply slide it over the front of bottom oven, bring one side down and rest on 4x4, the stand it upright on its side, sliding dolly under it. The bottom oven remove one side legs rest on 4x4, upright on side remove other legs.
I know it sounds really hard but 4 guys and some thought goes a long way. I would find a snowmobile type trailer as they are much closer to the ground. If you use your pick up, Remove your tailgate trust me and good luck