Problem is, how do you define "the classic arcade games"? What's classic to one person isn't to another. Sure, there would be plenty of games that would be in the vast majority of people's lists of classic games, but where do you draw the line between classic and not classic?
If filtering out clones eliminates versions of a game that you prefer, then manually switch those games. Personally, I have never cared about which region my roms are for. I think puckman is in my list instead of pacman, but I don't care enough to change it.
Also, when I first set up my game list I typically spend a half hour or so going through the whole list of originals looking for the games I like. Doing that on a list of 500 doesn't sound so bad to me.
If someone does have such a list to give you, great. But don't you think that list would be missing certain games you would want (but perhaps have forgotten about)? That's why I think going through the list manually is the way to go.
I know this isn't the kind of answer you're looking for, but maybe you just haven't thought of it this way until now. Hope it helps.