Indeed, the golems have their own niche, but there is variety to be found within them. I actually think that, as Ertxiem rightly said, there is space for a slow-moving golem with a ranged attack- a bit like the Bronze Golem, but rather than covering area near itself, it could launch forward attacks. I do believe such a unit can be avoidable- at the very least it will not be hard to calculate which area of the map they'll be able to cover in the next turn, so I don't think the range of a 2-3 tile hitting attack is such a big issue.