Depending on the handgun, you could just swap the front sight to tweak the POA/POI how you prefer. For your Glocks, Dawson Precision are the way to go for this kind of thing, and they can make sights in various thicknesses and heights for you.
For what it's worth, the Trijicon suppressor height sights for Glock seem to be POA/POI at 15 yards for me with a roughly 2.5" holdunder at 25 yards shooting 124gr.
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