I’m a big fan of hydronic heat, regardless of the way it’s done - coal, oil, or gas. My parents have a dual fuel stoker (coal and oil) at their mountain home, and still run coal in the winter!
I don’t think that oil is a bad choice if you have the infrastructure there. If you have natural gas, the modulating/condensing 97% efficient boiler with indirect hot water has been great for us. The zone with the indirect is all that really gets heated in the summer.
if you wanted to keep oil for winter heat, and had natural gas, some sort of tanked or tankless water heater That allowed you to bypass or just plain turn off the oil boiler in the summer, would seem like a great option!