If you are at the gates early, you can try for Baymax. Otherwise, Monsters Inc and Winnie the Pooh are good options. Peter Pan is also a decent option if regular guests aren't allowed in until official park opening time. After, you can then go do other rides in Fantasyland and Toontown. Grab whatever Priority Pass is convenient ASAP then try your luck at Entry Request for Club Mouse Beat. If you fail to get a seat from Entry Request and they happen to have free seating for the first show, then you'll want to get in line for the show by around an hour after park opening depending crowd levels..
Do not rope drop Beauty and the Beast without Happy Entry. I also don't really recommend rope dropping Splash Mountain or Big Thunder Mountain for first time visitors. If your visit is before the end of this month, you can choose to rope drop Space Mountain or make it your first Priority Pass.