If you have one gobbling on a ridge or the point of a ridge, he's probably alone- perfect. Try to get on the same elevation with no obstacles between you, then call, maybe scratch a little. If he doesn't answer, wait a bit, maybe move closer, repeat in a few minutes.
Once he does answer, get him to answer once more, then make him initiate all communication- you should now be answering him with shorter/soft yelp sequences or clucks, instead of calling to get him to answer. Don't be afraid to scratch in the leaves, too. But let him gobble a few times before you answer him with the call.
After you answer him a few times, quit calling entirely- he knows exactly where you were calling from, and will wonder what happened to you. And when he gets too curious, he'll come looking, and come in really close to where you last called from.
A jake decoy can work well here, but I don't think you need any decoys at all, especially in thicker country.
If he goes quiet for no reason, get ready. If he hangs up for several hours, consider moving away, then answering him again- make him think the hen is leaving. Do it again, an he should start working closer. Or running to you- call from a spot you can set up fast and shoot
If you find one with hens, call to the hens to bring them in, and he should follow.
If you can scout and get one patterned- plan an ambush, imitate what you see with decoys, and hide well with decent shooting lanes.
These birds aren't smart, just scared of getting eaten. But they're also love-drunk, the bigger ones to the point of violence and extra stupidity.
Always call from a spot you can get hidden quick- I've gotten answers to blind calling from under 100 yards, and the birds ran to me (caught me with my pants down).
Don't let them see you. Jakes eat just fine. Push button calls kill birds. Cadence is more important than tone. Get him cleaned ASAP for best flavor.