Harry’s height, you could get away with an actor 6 foot four or five and the rest is camera work to add the extra inches, that worked very well on Reacher, where they had the identical problem made worse by previous casting. My current pick would be the Succession actor Nicholas Joseph Braun, 34 and 2.01 meters tall, and clearly a good enough actor to carry a lead after working with Brian Cox.
I would have Harry doing a narration, but yes showing other characters more. Perhaps occasionally have another character doing a bit of narration to contradict Harry, like Thomas or Murphy. That worked in Young Sheldon and is a device viewer are familiar with. The early books in particular underserved characters like Murphy and Susan. Television is not first person narrative, they can be expanded without diminishing Harry.
You can’t mess around with the universe too much, it’s quite clear as the books progress that everything is connected and things have been unfolding steadily since Grave Peril.
I would bring in elements from the short stories, RPG and comics more clearly, perhaps as flashbacks.
CGI is good enough and cheap enough for effects to be books consistent, and frankly people are expecting it these days from a premium show.
It is going to have to run to the current time-line, no setting it ‘now’ it’s 2000 phones and computers and cars for the adaption of Storm Front.
People are familiar with the Multiverse, so you immediately run a la Star Wars a crawl of what leads up to Storm Front something along the lines of :
“In a universe not so very far away, mankind’s gods and monsters such as vampires and faeries co-exist in secret with humanity. A lone Wizard, and Private Investigator/Police Consultant Harry Blackstone Copperfield Dresden, acts when supernatural forces impinge upon the the mortal world in the City of Chicago. Together with his friends and allies, mortal and supernatural, such as Leuitenant Murphy of the CYPD and Spirit of Intellect Bob the Skull, Harry Dresden acts as mankind’s champion, even though his own people, the White Council of Wizards treats him with suspicion and have him placed under a suspended death sentence for killing his former master, Justin du Morne in a life or death magical duel when Harry was a teenager after he tried to magically enthrall Harry and his tragic first love Elaine to his will.”
Cut to the Yellow pages advert
No hat.
Definitely no hat.
Did I say no hat.