I usually have my lab do hi-res scans when developing the film, and then tweak it in Photoshop or Lightroom. If not, I use an Epson Perfection flatbed scanner. The best scans are drum scans, but they are costly, Next best, IMO, would be an Imacon/Hasselblad flextight scan. Not sure how it is near you, but in NYC there are new-style digital labs where you can rent scanner space to do your own scans by the hour to save money.

There are lots of add-ons for either or both of these programs out these for film photographers to maintain that natural look, but I do it visually, and to taste.

Just be sure that you have a profiled monitor (and scanner, if possible) when you do your adjustments. Full disclosure - my day job is with MAC Group (macgroupus.com), who represents X-Rite. this doesn’t mean I’m pitching a particular product, just being clear that it’s important to know for sure that what you are seeing is the truth.

I am totally in line with how you feel - for film work, I like it to be as natural as possible. The only retouching I do is dust spotting and level adjustments to match what I saw when making the photograph.