Although Isaac Hayes isn’t best known for his contribution to European cinema, he did actually make a couple of films of interest. Tough Guys was a 1974 Duccio Tessari crime film, in which he starred with Lino Ventura, Fred Williamson and William Berger. A decade and a half later he also appeared in Counterforce, an action film directed by Jose Antonio De La Loma which also starred Kabir Bedi, Louis Jourdan and Robert Forster.
Here’s an obit in The Times