Accurate Valiant BV-600NN Single Speed Reels

The 600NN is a specialized size from Accurate so it will not work for most applications because of the narrow spool but it works exceptionally well for jigging of all kinds since you never have to worry about guiding the line back when retrieving. It only holds about 300 yards of 65lb so lighter lines are definitely preferred, for slow pitch a 20-30lb line would be perfect. This can work as a heavy bottom fishing reel with heavier line in scenarios where line capacity doesn't matter, if you're targeting big grouper in 100-200 feet of water then this is the reel for you. 

You can even make this size into a dedicated yoyo iron reel if you're okay with mainly fishing braid. It won't cast lures that well since the diameter of the spool would drop too quick but you can certainly flyline a bait out in a pinch.