FINAL FANTASY V
As is becoming tradition with odd numbered entries in the classic series, Final Fantasy V sees a return of the class system last seen in Final Fantasy III, however unlike FFIII, FFV aims to have a story and characters on par with FFIV while also maintaining a complex class system. This game focuses on four Warriors of Light tasked with trying to save a dying world, however unlike the blank slate protagonists of FFI and FFIII, the central cast are all fleshed out characters who are given the ability to learn and swap classes by the four main crystals of the world. There are two versions of FFV that I recommend: the Game Boy Advance version and the Pixel Remaster. Much like with FFIV, due to how similar the Pixel Remaster is, I will not be recommending it separately, but it still serves as a great way to play the original game if so interested.
The GBA Version
The GBA version of FFV features new bonus dungeons and bosses, as well as the addition of four brand new classes in the class system. Other than that, the GBA version features a small amount of bug fixes and Quality of Life improvements over the original, however the main selling point is that new content.
The Pixel Remaster
The Pixel Remaster does away with the bonus dungeons, bosses, and new classes from the GBA version in order to stay more in line with the pacing and intent of the original release. However, many of the balancing changes and Quality of Life improvements from the GBA are retained, generally making this version a more polished and streamlined experience than the original.