I’ve tried 3 different ones and finally found one I’m happy with. (For my 15 Pro Max, but they have all of these for the 15 Pro too)
First was the Mothca Matte Glass. I love the fit (case friendly), but it ended up making the display a little too grainy for my tastes. But my wife has one on her 15 Pro and loves it, so YMMV.
Mothca Matte Glass Screen Protector for iPhone 15 Pro (6.1 inch) Anti-Glare & Anti-Fingerprint Tempered Glass Clear Film, [Easy Installation Frame] Case Friendly, Bubble Free - Smooth as Silk
https://www.amazon.com/Mothca-Protector-Anti-Glare-Anti-Fingerprint-Installation/dp/B0CDLQX5YX
Next up was the Benks Anti-glare. Doesn’t make the screen grainy and fit is outstanding. But 2 things…first, it’s not the most case-friendly as it’s pretty much edge-to-edge, but it did work with my Caudabe Sheath. However, if I pressed the top of the case down, it would start to lift. But that’s because of issue #2. For some reason, Benks thought it was a good idea to put a little bump out that goes OVER the top speaker. They say it’s to keep dust out, but it makes the protector less case friendly and it blocks the sound. I tested it and sure enough, you can barely hear anything coming out of the top speaker. If they remove that little bump out, I’d get them again.
BENKS [2 Pack] Anti-Glare Matte Screen Protector Compatible for iPhone 15 Pro (2023,6.1”), 9H Full Coverage Tempered Film for Gamming[Ultra-Thin][Ultra-Smooth][Anti-Fingerprint][Bubble Free]
https://www.amazon.com/BENKS-Anti-Glare-Compatible-Ultra-Smooth-Anti-Fingerprint/dp/B0CDV4SF7S
So I went searching for recommendations on YouTube and came across the Ambison Matte Glass and for me they’re perfect. The clarity of the Benks with the fit of the Mothca. Nice and friendly to cases, too. I can’t recommend them enough. I’m really, really happy with them.
Ambison [2 Pack Matte Glass Screen Protector Designed for iPhone 15 Pro, Install Frame/Bubble Free/Anti-Glare&Fingerprint/Smooth as Silk, 9H Tempered Glass compatible with iPhone 15 Pro 2023 6.1inch
https://www.amazon.com/dp/B0CCJCRV2T?ref_=cm_sw_r_apin_dp_YR3DMNXBE6KZJGX70CSS