Out of the orals I have used I would say tbol or dbol. Out of lurking on the net it seems Methyl Trienolone should be the big dog.
I really want to believe anadrol (with nolva) has given me the most muscle. That is really hard to judge though, because I don't know how much of the gains to attribute to the anadrol, since it was used with 500mg week test.