A stem change is a great way to fine tune a bike fit.
If the stem is not 90° from the steerer tube, but angled down, you could just flip it over to get a rise instead of a drop. Assuming that's not an option, I like the suggestion in Post #3.
I have an adjustable stem on one bike, not only does it look hinky, but it's also a LOT heavier than a one-piece stem, which kind of defeats the point of that bike, IMO. (it doesn't matter on my commuter eBike)
Changing handlebars would be a last resort for me, esp. on that bike.