I think rump steak is the best of the lot, it has a good enough flavour to be able to eat without drowning it in salt, pepper and sauces. People crap on about rib-eye and fillet etc. and how tender they are. Jelly is tender too, does not mean it tastes good.
One of the nicest steaks I ever had was when I had lunch with two Aboriginal mates out in the desert on a seismic job, next to a bulldozer and a bloody big sand dune.
Piece of rump with a bit of butter and onion, cooked on an old shovel on an open fire, on a couple of slices of white bread.