Has there been, in recent memory, any grid scale generator, or roof-top solar for that matter, that didn't get significant subsidies?

The argument should be about whether or not those subsidies would have been better spend elsewhere.

I'd probably argue subsidising local wind / solar (plus storage), and local manufacturing of same, would be better, even though I tend to argue nuclear is a reason option some of the time.

Subsidies for renewables are very reliably seen to drive prices down faster than would have happened without, producing always a very large net gain.

Nukes have been heavily subsidized forever, but prices have only ever risen.

Maybe you mean not up as fast, otherwise where is this fantidy land where consumers prices have gone down?

Rooftop solar doesn't work for renters, apartment buildings, and those who can't afford to purchase panels.

Those groups buy power from electricity retailers.

Show me an electricity retailer who has deceased prices in the past 10 years.