Don't "starve" him until hungry into eating the raw, it could make his resistance to it even stronger.
Try "accidentally" dropping a small piece while in the kitchen at the counter or table, especially if you are cooking something else. This usually works since they think they've "stolen" something tasty
Yes, try other proteins he may just not like what you've got. Duffy loves cooked beef but won't eat raw beef
she prefers bison
You can also try a tiny amount of melted butter drizzled on it, or a treat/kibble on top