I love this list! Whitney was the Queen of covers. Surprisingly I've never heard the original version of I Will Always Love You until now and Dolly's version is great too. That song overall is just a beautifully written timeless classic. However my list is based off my favorites:

1. I'm Every Woman
2. Greatest Love Of All
3. I Will Always Love You
4. All the Man That I Need
5. Saving All My Love For You