"Journey to the Center of Your Heart" recorded by Chaka Khan.
"Open Book" recorded by Jevetta Steele.
"Allegiance" recorded by Howard Hewett.
"Girl" recorded by The Time.
"I Hear Your Voice" recorded by Patti LaBelle.

If I were given access to the vault for just 5 minutes, his versions are tracks I would be tearing up the place looking for!