Those levels are generally below the power of one-shot universe busting.
Someone like Odin, if no one tried to oppose him (i.e. Galactus, Celestials, Eternity, Abstracts) could probably seriously screw over the universe, as in kill all life in it, crush all the galaxies, and basically make the place uninhabitable if he was to fully cut loose with his power, but I don't think he could just go BAM and suddenly no more universe. You need at least Cosmic Cube level power to do that.
The mid-herald thing was just an accident, I typed it by mistake and then I decided to leave it there for the funs, he's low herald
And yes, obviously Kang needs some high amount of prep to kill an universe, and may I add, he does it not because of his "power" but because time manipulation messes up with universal constants pretty bad.
By altering past events, WR effectively stopped Monarch's universe from ever existing. Realistically, any being capable of traveling through, and manipulating, time should be able to duplicate that feat... But it's still 'universe busting', I suppose...
However, that feat is also much different than a character busting a universe with an offensive energy blast, or somesuch.
"A great tactician creates plans.
A good tactician recognizes the soundness of a plan presented to him.
A fair tactician must see the plan succeed before offering approval.
Those with no tactical ability at all may never understand or accept the plan.
Nor will such people understand or accept the tactician.
And when a mind is too deficient in understanding, the resulting gap is often filled with resentment."