I think it would be Robert Jordan. His Wheel of Time series was 13 books, although the final two were written by Brandon Sanderson after Jordan's death. It was still Robert Jordan's story, even though Brandon Sanderson wrote the words.
I found them to be different. Matt was one of my favourite characters, and it must have been Brandon's too because Matt really came to life under Brandon's care. Unfortunately, Brandon didn't do the last big battle any justice at all. It felt like he was writing in autopilot, I felt like I was reading a screenplay instead of a novel. In all fairness, Brandon brought all the characters to life more than Jordan did, but his flow in the story was not there. So it went both ways for me.
Colin Dexter. His 'Inspector Morse' novels. Followed by Thomas Hardy, as 'Far From Madding Crowd' was set book for Senior. Read all his others' as well, as enjoyable, but dark. Enjoyed Delderfield . Also the 'Swann Saga', but can't remember author!
I have read all of James Lee Burke's books (I think the total is round about 15/16). He writes beautifully and so descriptively. He writes really good thrillers but his form of writing is magical in the descriptions of locations. There are many authors whose books I have continued to read through the years but I think James Lee Burke is the one writer I have followed religiously with each book he produces.