Star Fox Adventures main problem was it was a collectathon. It's a good game, but its not really a focused Starfox
game. Its Dinosaur Planet with the Star Fox theme.

I don't think most people care whether the game is a rail plane shooter, or an off rails plane shooter.
The thing people compare it to the most is the Star Wars flight series. To really compare Star Fox's evolution you
have to also compare series that have the same sort of space flight theme.
Space invaders is not an on rail shooter, but it is the non scrolling version of galxian/galaga
galaga
asteroids
defender
gradius
Starfox is pretty much 3d Gradius
star wars arcade 83 (this one is important to note because like Star Fox its an early vector game)
1942
Super Star Soldier
super star wars (a game with a variety of things to do)
cybermorph - I used to have this game, and its pretty comparable to Starfox in many ways because its in the same
genre and the same time period of sf1 and sf64
N64 Rogue Squadron
Gamecube Rogue Leader
Star Wars Battlefron ps4/xboxone (a newer game with a bunch to do)