For subtle yet realistic colors, it's difficult not to recommend Cinestill spooled for 35mm camera use. If you're not aware, it is essentially Kodak Vision 3 cinema film with the remjet layer removed. The problem is, you pay for that privilege. At over $11 USD a roll, it's not in my budget to shoot very much of it throughout the year.
I recently shot a roll of the Cinestill 50D after a snow storm in our area, on a sunny day when I could get some color in the sky. These were done on a Canon AV-1, so I had to rely on auto exposure. I set the ISO to 25 to get a more correct exposure level on the film. I processed it myself in my own C-41 chemicals. To my eyes, these are ideal colors for this purpose, with good shadow detail and (mostly) keeping the highlights in check.
Since I'm a DIY film guy, I will likely get the Vision 3 50D in the future and remove the remjet layer myself. It's not a difficult step (I've done it before). If I bulk load it, I can pay as little as $6.11 USD per roll. I like that a lot better than $11.