Superman, J'onn, and Wonder Woman (Woman Woman lassoed J'onn in a black hole and Superman pulled him out).
Kyle waded through a field of singularities that made up a cosmic singularity. Odds are other lanterns of a similar skill level can do the same thing.
Flash escaped a black hole as part of the first round of the race in The Human Race.
Superman held a black hole in his hand.
Kilowag and several B-grade lanterns flew through a black hole and came out of a white hole.
Jeff Smith's Captain Marvel used Power of Zeus plus Strength of Hercules to create a black hole accidentally with a single punch by collapsing light. Odds are other Captain Marvels can do the same.
So most space-level DC characters.