Some people argue XIV is the best FF. It's a little unfair because it gets hundreds of hours to develop it's story but man Endbringers is fucking incredible. XVI feels like knock off GoT. XIII is really good, except it feels like the tutorial takes a third of the game and you also have to read the codex to understand what's going on and that's like adding a book to your 50 hour game. XV is really cool but very different from the rest of the series, it's probably the most approachable of the 4 (although it does have a huge expanded lore if you really want to get into it)

In short: XV yes, XIV yes if you're willing to sign up for an MMO, XIII maybe, XVI not unless you like GoT type stuff