Either the top one would be too high or the bottom one would be too low. If you need all that, maybe you should be considering a range + wall ovens, or even a double-oven range?

Example: KitchenAid KODE500ESS Double-Oven

• Acceptable cutout height from floor: 7-1/2" to 14-3/4"
• + Oven cutout height: 50-1/4"
• = 57-3/4" to 65"

So the bottom of a third oven stacked over a double oven would be around five feet or even more above the floor. This isn't reasonable. Note that neither GE Appliances nor KitchenAid/Whirlpool show their ovens installed this way, though GE Appliances does allow its double ovens to be stacked above a warming drawer.

Read the installation manual. Manufacturers describe the limits on stacking (and other installation requirements) in their instructions. Ignoring those limits can make your house unsafe and violate building code.

NO.

We were in a rental while our house was being built. It had 3 ovens stacked. It was horrible. The bottom oven was basically on the floor.