For sweeping adventure, I'd suggest The Last of the Mohicans or Silverado. Neither one is lesser known, but they could be for you.

Silverado is a great western, fast paced, almost exhausting.

If you have not seen it, The Gods Must Be Crazy is outstanding, especially if you like slapstick comedy.

The Thin Red Line (More drama than adventure)

Ip Man

Spy Game, just saw it today again, been ~10 yrs. Still good.

There were three of those. I enjoyed them all.

Currently at the theaters I enjoyed Hidden Figures, a great movie, and was really surprised that Live by Night was just an excellent film, a man's movie with a little extra going for it.

I liked that, nice work.

Brazil.

Just watched Saving Private Ryan yesterday (second time) and I forgot what an outstanding movie it is. I ordered it on my Apple TV and told my sons it will be a manditory watch.