Why nobody is mentioning the exchange ruy lopez? Its even played by Fisscher i thought. But the normal Ruy Lopez isnt that hard to play. The main line and most side sidelines are pretty straightforward. Castle, Re1, c3, (h3), d4 and hop your knight Nd2-f1-e3/g3-d5/f5. Only though nuts to crack is the open and the archangel. Dont forget to play a move order to avoid the marshall. The most important thing for me at least is to have a straightforward plan. And thats easier in the Ruy Lopez as it is in the Scottish.
Another line that was extremely popular on my club was the scotch gambit. Especially the e5 d5 Bb5 Ne4 Nd4 etc line. I would recommend that line (or play 0-0 instead of e5) then going for the pawn with Ng5.
But i wont recommend the italian at all. White wants a pawn break if he wants the initiative. Either d4 or f4, but those are extremely hard to manage in the italian. The reason is that with the bishop on c4, there are a lot of tricks with Nxe4 and d5. Freeing black while attacking the bishop and defending the knight. In the Ruy Lopez with the bishop on b5 white is fast enough for the c3-d4 pawn break and so can do without defending the e4 pawn. Its way easier to create your center and maintain the initiative in the ruy lopez without sacrificing a pawn. In the italian you are likely to play either the evans or moller. Both involving a pawn sacrifice. The Guico piano is the only setup that goes for c3-d4 in the italian, but is so much slower as the ruy lopez that it doesnt make sense to me. Sometimes black manages even to play d5 before white can make his d4 pawn break.
If you want to go for c3-d4 pawn center and long lasting initiative, go for the ruy lopez. If you want a open strategic battle (with of without queens), go scotch. If you want early initiative go kings gambit. If you want to do it a bit different and want a f4 pawn break without directly sacrificing it (a bit like the queens gambit) go for slower setups with Nc3/Bc4 and a later f4.
Sorry i wont recommend italian at all. It was my first opening till i came to the conclusion that it isnt in line with the e4 e5 opening at all. And i should know because i played e4 e5 openings with both colours for years