Oats are good in a shake with some whey and a banana, blended up. Otherwise for taste, you can't beat sweet taters. I usually steam up 1/2 tater with my veggies....tastes amazing...
I eat all 3. Oats for breakfast, sweet potato mid-morning pre-workout, (workout at lunch time) protein shake post-workout, brown rice mid-afternoon before the evening meals of meat and veggies. This way i enjoy the benefits of all 3 complex carb sources and keep some variety to the diet.
here is a little tip i do and i hated oats. i love them now. taste great, u just add 100g of frozen berries ( thaw them for 12 hours nite before in fridge). i get a mix of them in a pack at a store that contain blueberries, raspberries, strawberries, blackberries etc. i firstly cook the oats, then add some cookies and cream protein powder, a little milk and cinnamon, then add the berries. try it tastes great.