I think you're overstating the danger of oil tanks. You mention explosion risks, that's a very rare occurrence and could happen with gas or propane too. The real downsides of oil are the high prices and the carbon footprint.

Wood is at least much cheaper and has charming appeal, gas is cheaper too but not available in many districts. Propane is extremely cost ineffective for heating, it'd be much better to use any other type of heating if possible.