I'll give you Scorsese, though I don't think he's demonstrated as broad a command of different genres as has Eastwood. He is absolutely fantastic at the gangster/crime stuff that is in his wheelhouse.
Look at Eastwood's body of work -- across genres, etc.. The Outlaw Josie Wales (personally, my favorite western), Letter from Iwo Jima (a fantastic war movie). Bridges of Madison County, Unforgiven, Dirty Harry, Gran Torino, Million Dollar Baby, High Plains Drifter, Play Misty for Me, Sudden Impact, Sully, American Sniper, Mystic River....
He's done everything from intensely personal dramas, to epic war movies, westerns, love stories, police dramas, sports movies. The only thing he really hasn't done is Sci-Fi/fantasy.
But hey, it's really just opinion.