My wish pick for Ben in the "It" sequel is Jason Ritter.
His father, John Ritter, played the grown up Ben in the original "It" film which would be an awesome nod to fans and a cool homage to the classic. That being said the real reason I want Jason Ritter for the part is because he is an amazing actor and brings life to all the roles he plays. He can do both comedic and dramatic flawlessly. I would also like to point out that Jason really does actually look like a older Jeremy. Let's make this happen people!