I only use Topaz Denoise and it too sharpens so aggressively that I try to avoid using it. But I when I do use it I too clean up those sharpening halos. You would think that turning off sharpening altogether would actually turn it off, but it doesn't. Set sharpening to zero and it still sharpens.
That's why I switched to DXO Pure Raw. I apply it on the RAW file before I do anything else and I find it's wonderful. If I need to sharpen a little bit after editing and downsizing I will either do it myself the old fashioned way with an edge mask and Smart Sharpen. Or take it to LAB mode and do a High Pass on the lightness channel.