How much money do you have in your budget? If you want to go for broke, get a Miele combination steam oven with an extra large XXL oven cavity, and a Miele Speedoven with a regular oven cavity. If I recall correctly, stacking those two units will take up 42". Have a small filler strip made that makes up the remaining 4.5". Either match the stain of the wood, or clad the strip with stainless steel to match the appliances. Or even better, have a carpenter put in a shallow drawer.

This will make the kitchen extremely functional. If the new homeowners like to cook, they'll definitely appreciate it. Unfortunately, it also costs a lot of money. If you plan on living in the house, then that makes sense. If you only want to do this for staging, then it is way overkill. There is a good chance that the home buyers will rip out appliances anyway and install their own.

Miele because you need stainless in a home you're selling is an unusual use of money. But along those lines a single oven and a Sharp micro with filler strip(s) would be almost as good and many thousand less. Here's a euro convection single electric for 690. And a Sharp stainless for 200. I'd find these very usable. This micro is 24-1/10" If I were buying the house I'd really like seeing the Miele options. Especially with a Miele induction cooktop.

I would never replace a working appliance in a place for sale. That oven is not going to be a deal breaker for a potential buyer, if they like the house and not the oven they can deal with it later.

Totally agree with above comments.

Do not replace the ovens. That is plain silly. The kitchen is old and will be gutted or the buyers will be broke and be happy with working appliances at a reasonable cost.