Godwinson was on the edge of winning at Hastings. If only a few things had gone differently in 1066, he easily could have.
Confederate victory is often bandied about, but typically takes a bit of playing against the odds to work out. It's not very likely, at least, not in the form that it's usually imagined as.
The last one now...by ERE, do we mean, like, a Greek state in general, a Greek state with an unbroken line of history, or an Empire that's a direct continuation of the ancient and medieval Empire? The first is very plausible; the second and third, not so much.