at least riften's a bit friendlier.
They also have Bolli, Mjoll, and Aerin.
And to the thieves guild, it's more about money and less about power and murder.
I don't see corrupt as something you put on a 1 to 10
Usually you are corrupt and you do whatever you want to get to your goals.
Or you don't, and you uphold morals.
It's moreso a matter of what your goals are and what kinds of morals you're willing to sacrifice or not.