Don't discount Kutter Crawford. He's pitched very well this year and will be put on the 40 man this offseason. Not sure if they try to keep him as a long man or stick him in a short relief role. Not sure he'd be better than a 5th starter, but he couldn't be worse than Perez. Murphy gives up too many hr's and is probably destined for the pen if he can't fix it. Bello is far away. Winckowski and Seabold could provide something next year. Ward is out with TJS. Groome is still far away, but at least he's been healthy this year (if he pitches well in AA next year, maybe we see him as part of the rotation in 23).
There's definitely some more interesting guys than we've had recently.
You didn't mention Feltman, someone who has gotten a lot of press previously and now is under the radar. After giving up 3 ER in his first AAA appearance, he's gone 9.3 innings in his last 7 appearances and has only given up 1 ER, 4H, 10K, 2BB. He'll probably have a legitimate shot to be on the Opening Day roster next season.