At best, the pond is a local source of mosquitoes.
Predators such as dragonflies can only achieve a balance: if the mosquito numbers decline, so will the dragonflies.
If the pond cannot be covered or drained, I would encourage you to consider frogs, as Mσᶎ suggested. Worldwide, frogs are in decline, so introducing local species to the pond would seem to be a positive in sustainability terms.
But nothing comes for free: the dragonfly larvae will also be eaten.
While a few ordinary goldfish (or, as the Wikipedia article you linked says, guppies) will enthusiastically eat the larvae, they too will only achieve a balance. The total number of mosquitoes will be lower, but they will still be present.
Goldfish are omnivorous, so when they cannot find mosquito larvae, small crustaceans, or zooplankton, they'll eat vegetation and detritus. So they will not decline when the mosquitoes are eaten.
Unfortunately, any predator will also eat the dragonfly larvae, frogspawn, and tadpoles.
You do not mention your location, so we cannot know what indigenous fish could be introduced to the pond. It would have to be a species that copes well with still water.
In order of preference: frogs, local fish, cover or drain the pond. Avoid goldfish, since they are an introduced species and could escape.