The stained glass golem has Str 13, Dex 10, Con —, Int 4, Wis 13, Cha 7. It is Medium. Upsizing those to Large (and restoring them to mindless) yields...
Str 21, Dex 8, Con —, Int —, Wis 11, Cha 1
That's essentially the same as a flesh golem. Does that work?