Hardest to Eeasiest:
Skyward Sword
Twilight Princess
Majora's Mask
Wind Waker
Ocarina of Time
Reason being that OoT is a simple blueprint where SS builds on it to make a tower of challenges. That, and the control scheme is vastly different. MM is harder to beat because of frame rate issues and lack of direction. TP is hard to beat because it takes a long time to complete your goals
Skyward Sword
Twilight Princess
Majora's Mask
Wind Waker
Ocarina of Time
Reason being that OoT is a simple blueprint where SS builds on it to make a tower of challenges. That, and the control scheme is vastly different. MM is harder to beat because of frame rate issues and lack of direction. TP is hard to beat because it takes a long time to complete your goals