A statue, a bust, a park, a hospital, an athletic field, a bridge, a highway ... naming such things in memory of notables and philanthropists is not unusual.
|Milan's Duomo cathedral|
Gargoyles are fantastic carved representations that were and are used to convey water away from the structures they adorn. In church mythology, they were intended, as well, to convey a sense of evil to a largely illiterate audience: Evil was kept outside the church ... and you'd better remember that evil is waiting to pounce, in this life of the next ... and put some money in the collection plate.
Gargoyles have sass. Tombstones do not. If I were going "to be remembered," I would rather be remembered for sass than gravitas.