The best instrument is the tenor saxophone. Here’s why. It is practical and very easy to learn and master, and is extremely easy to transfer from one saxophone to tenor. It is also most like the most iconic instruments. It is well known for jazz, is the symbol of charisma and sex, and sounds overall beautiful. It is also very easy to learn. Although tough to maintain, it is very easy to nail the fingerings down than the trombone where if you slide just a smidge too far it will sound very wrong. Trombone also takes years to actually sound good from a player, where in a few weeks if not a few months, a player can read and play sheet music. Those are the reasons why tenor saxophone is the superior instrument.