Growlr and Scruff.
Both are fun, but not a lot of guys in my area unfortunately. Bigger city areas obviously have more selection.
Growlr is more for the Bear and Average joe community from what i've seen.
Scruff, is also for the bear/scruffy puppy guys, but many are either fit, or muscular.
Never tried Grindr yet.
Adam4Adam was always dead - had the atypical guys on it...
Jackd appeared to be the younger guys. Hot, muscles, young etc, and not looking for anything over 25 type of thing.
Everyone's experience may be different based on geographical location though.