Solar's a little bit less killy than nuclear (people die when mining raw materials and from falling off rooftops when installing panels) and wind turbines are a little more dangerous than nuclear (mining raw materials, falls during installation/maintenance and people burning to death during maintenance), but hydroelectric power is much more dangerous than nuclear (mainly from drownings after dams burst). Until very recently, nuclear was the safest means of power generation by a wide margin, so if safety is the main concern, there should be a lot more of it.

A big reason for this is that a single nuclear power plant can power a city despite having the same footprint as a small village worth of wind turbines or solar panels and running for decades off a wheelbarrow of fuel, so there's much less for construction workers and miners to do and fewer opportunities for them to die. It only kills when there's an accident bad enough to make international news and remain in the public consciousness for decades, and accidents that bad have only happened a handful of times.

Biomass is not sustainable. You'll cut your forests down to sate demand.