I don't think there is any weak ship in Revenge line, except for Revenge itself.............
If you have Dunk, then you just need to grid 4 more levels to lvl65 Queen Elizabeth, if I'm not mistaken - a ship that is as small as Italian ships and has a range of BB3 (15*2 MarkIII Normal).
After that you have KGV and POW, nice little ambush ships, then LionI probably, then LionII.
If you are good at sling shot, I strongly recommend EBB Hood1939 to you. This is a ship which will fit into the void of playstyle of Revenge line: A FAST Battle Cruiser going up to 44knt at top speed with 4 main-gun setup.
The Valliant is good (sadly I don't have it yet), but I don't think it's as fast as EBB Hood1939.