What cocktails can I make with Angostura, orange juice, pineapple juice, Cointreau, prosecco, rum, and gin?

Based on the ingredients you have provided—Angostura bitters, orange juice, pineapple juice, Cointreau, prosecco, rum, and gin—I'll guide you towards some cocktails that might suit your taste.

The most highly rated cocktail that includes some of your ingredients is the Anejo Highball. This cocktail, created by the legendary Dale DeGroff as a tribute to a Cuban bartender, is a beautiful mix of white rum and orange liqueur complemented by a dash of Angostura Bitters and a kick from ginger beer. The mix of flavors and the citrusy undertone make it a delightfully refreshing drink that perfects the balance between fruity and spicy profiles.

For those seeking a more tropical experience, the Bajan Bomber might be just the thing. This is a lower-alcohol option but doesn't skimp on flavor with its combination of pineapple juice, orange juice, white rum, and passion fruit liqueur. It's a cocktail that channels beach-side relaxation, often garnished with decorative fruits that add to its aesthetic appeal.

If you're leaning towards a cocktail with a gin base, the Intro to Aperol could be an exciting choice. While it doesn't include all your specified ingredients, the fresh lemon juice and Aperol combine wonderfully with gin and just a dash of Angostura Bitters, creating a visually appealing and vibrant drink that tingles the taste buds with its balanced acidity and bitterness.

Each of these cocktails brings its own unique flair to the table, and given their high ratings and diverse flavor profiles, any of them should make for an enjoyable and refreshing choice.