Hey Mike, your post reminded me that I saw this recipe recently for bacon onion rings!
Wrap a strip of bacon around two doubled up raw onion rings. Use each strip to wrap around the entire ring until it is covered and the center is open, Lightly coat the bacon with brown sugar then bake them at 400 degrees on a sheet tray for about 30 minutes until crisp. If you want to level up even more, add some spices (chili powder and/or cayenne) to the brown sugar or use maple sugar instead of brown sugar.