Wasn't Mitchell Hashimoto only a non-CxO for a handful of months between stepping down and selling the company?

I'm not that familiar with his employment history; you could be right. Either way, he'd still be an example. If you have longer term ones, I'm sure it would add to the discussion

I recall James Goodnight of SAS coding while being a CEO. As per https://www.forbes.com/sites/peterhigh/2014/05/12/an-intervi..., he still programs from time to time but doesn't have a specific part in development. In looking at the articles to refresh my memory, it is clear he is one of the good CEO's

I don't think that's the model we should be looking at here. I'd add Stephen Wolfram to the very short list of similar technical CEOs.

Tobi Luetke at Shopify too