How to keep  or  tags from getting in WYSIWYG editor with ckeditor? Seems simple, but I haven't been able to find any way to do it.  

To be clear, I want ALL other tags for this text format, just not font or style tags.

Thanks.
Use a text filter (format) that allows all tags you want and doesn't allow font and style tags. I also recommend removing toolbar buttons that add these tags, such as font, font color, font size etc. You could add custom styles that add CSS selectors rather than inline style tags.