There's a lot of good cops being tarred with the brush which should be reserved to tar only the bad cops.
On the other hand, a lot of bad cops shelter behind the gleam of their badges as they pretend to be good cops.
For a lot of good cops to be unfairly tarred with that brush there would have to be a lot of good cops. I do not think that there are. However, I may well have a more strict definition of "good cop" than you do.
Most people who say what you said here will look at a situation like we recently had here, in which a cop was convicted of raping a woman he pulled over after she declined a sex for free pass on the ticket offer, and say "that is a bad cop, but that's just one cop."
I look at the cops in the union, which provided this guy with far better attorney representation than 99% of the people they arrest can afford, who displayed no outrage at all, and say "while you aren't raping women on duty yourselves you aren't "good" cops. Maybe you aren't blatantly BAD, but you aren't good.
I look at the cavalier way this guy committed this crime and see it is very unlikely that he just decided that day to try something new. He had engaged in some amount of similar acts, or acts building up to this. If people he worked with every day who are in law enforcement failed to notice anything odd about this guy in regards to how he understood "power of the badge" they are too dense to be good cops. If they did recognize it, but didn't want to look to closely at a brother officer then they are even further from being good cops.
So I see a force with at least one bad cop,
maybe a good cop here or there, and a bunch of cops that are probably neither that I have little or no sympathy for.