Dennis E. Taylor, mainly for his Bobiverse Series (only thing I've read by him).
I think he's not very well known, but his Triology fits the theme very well: It is about the engineer Bob, who is uploaded as a "replicant" into a spaceship. Humanity mostly wipes it self out using nukes after they got the Bob failsafe away into space, and Bob gets too deal with the remnants of humanity. He replicates himself, too the point that the Bobs can host a Bobmoot and vote on things. Due to being immortal, some Bobs starts calling humans ephemerals, wheras others are offended at the implication that they're not human.
It's a very interesting and entertaining read. I'm also writing this from the top of my head and have only read this triology by him.