Closeby to Hopetoun Falls, is Triplet Falls. This is just past the Otway Fly Treetop Walk. I have been to Triplet Falls many times. I tend to go everytime I visit the Great Ocean Road.
It is about an hour circuit walk, with plenty of stairs! You visit 3 viewing platforms to see the waterfalls. The last is by far the best. The photos I have shown here are all from the last viewing point. The trees and greenery do block a lot of the waterfall, but this does add to the atmosphere when you are there.