I have an early 2000's Mizuno Fli-Hi 21* that I've been trying to kick out of the bag for over a decade & just can't....
It may not count as a utility, but I use my Vapor Pro Combo 3i (20°) as a fairway finder off the tee and am more than comfortable with it off the deck, easily favorite club in the bag!
After another failed attempt at trying to find a suitable hybrid I will be looking to add my first ever utility iron to the bag. So far I have only hit the Srixon Z U85 which was pretty spectacular. Would love to try the Mizuno HMB
I'm still using the U65 18* w/DI-105X as my driving iron when the wind is howling and the fairways are bouncing. It can replace my 3w and hybrid on some courses. I used to prefer the ultra-thin blade look of my Nike Pro, but I get more from this club and far easier out of the rough/straw. I've added the Callaway UT 21* w/DI-95X also for filling the gap of both 3i & 4i with the versatility of those irons. As far as looks go, I feel it blends smoother from MB to DI. The Graphite Design Hybrid Shaft works best for me in these clubs, with more weight in the U65. I did have Modus 130X that worked great, but this setup functions better.
Another vote for u85
Been using a G410 Crossover 3 iron with a TZ6 85 and it's really solid.
My GAPR Lo came in today and kicked the P790 UDI out of my bag. Both go about the same distance but the GAPR Lo is a lot less penal on mis hits.