What are his best

If you haven’t already seen it, you might enjoy Man In The Wilderness. Just a heads up though, so that there are no surprises. It’s based on the story of Hugh Glass, so if you’ve seen The Revenant, the plot is going to be similar.

https://www.imdb.com/title/tt0067388/?ref_=nm_flmg_act_51

orca

Cassandra Crossing

Some really good (obscure) Harris movies;

The Hero (1970)
Ravages (1979)
Your Ticket is No Longer Valid (1981)
Highpoint (1982)

I liked Trojan Eddie a lot. And also all the Horse movies.