I like a variety of snails such as Trochus, Ceriths, Stomatella, etc. Hermit crabs are popular too, however, I prefer to avoid most crabs and shrimp as a lot of them can be aggressive toward the snails, steal food from certain coral species, etc.
IME true Peppermint Shrimp are effective against aiptasia and if you have an infestation they'd be a good first choice to combat the problem.
As for hair algae, some of the larger snails, conchs, urchins, etc. are all possibilities as well as several herbivorous fish. Nutrient control/reduction is a large part of the solution, however.
There are fish and crustaceans that will eat bristleworms, but personally, I would not be looking to eliminate them as most species are reef safe and excellent scavengers.
That's my $0.02 anyway...
...HTH