Used Oxford soft panniers on Liz's Fazer 1000 when we took the kids on a 2 week tour of Europe in 2004.
Still have them, still use them and they're still brilliant (pics below are almost 14 yrs old 😀) - no issues with interference of passenger feet, or legs, even though in the second pic our son was only 9 yrs old.
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%5BIMG%5Dhttp://i42.tinypic.com/2zg4vw9.jpg%5B/IMG%5D
Problems with pic images I'll try to resolve !