I expect most regulars fit that description, if by "low karma post" you just mean one that hovers around 1 point (that is, one that is neither upvoted nor downvoted).
FWIW, looking at my own history ( I post fairly often ), I find that the vast, vast majority of my posts get either no votes at all, or maybe 2-3 upvotes, a few here and there get a downvote or two, and a small handful get 3-10 upvotes, and a very few here and there get major upvotes (10 or more, up to maybe a hundred or so).
Other than "celebrity" posts who always get massive upvotes (pg, etc.) I'm guessing it's that way for most people.
Now, if you want to find people who have lots of posts that are highly upvoted AND lots of posts that get lots of downvotes... that I'm not so sure about. I can think of one or two people here on HN who are occasionally "controversial" who might, but I'm not sure I want to name names, as it might come off as insulting to suggest such a thing. :-)
What have you tried in order to investigate this yourself? I ask because I just tried the first thing that came to mind and got an immediate answer. As a result I'm wondering what you've already tried.
Or have you just asked on a whim, and not actually tried anything?
So I just pulled up the top 100 people from the leaders list and looked at submissions from 5 chosen at random. In each case there were submissions with over 100 karma points, but the majority had just one or two. So these are people who post regularly/frequently, and have very high, and very low karma points on those submissions.
If this isn't what you want to know, perhaps you could be clearer. In particular, since karma on comments isn't shown, I'm assuming you meant submissions. If you meant something else, then this is a chance for me to learn how to see the karma on comments.
FWIW, looking at my own history ( I post fairly often ), I find that the vast, vast majority of my posts get either no votes at all, or maybe 2-3 upvotes, a few here and there get a downvote or two, and a small handful get 3-10 upvotes, and a very few here and there get major upvotes (10 or more, up to maybe a hundred or so).
Other than "celebrity" posts who always get massive upvotes (pg, etc.) I'm guessing it's that way for most people.
Now, if you want to find people who have lots of posts that are highly upvoted AND lots of posts that get lots of downvotes... that I'm not so sure about. I can think of one or two people here on HN who are occasionally "controversial" who might, but I'm not sure I want to name names, as it might come off as insulting to suggest such a thing. :-)