afraidfortherepublic, greeneyes, Gabz, tubebender,bgill, Arrowhead1952, applegateranch, bean_counter, are some that come to mind, other than the ones that I see that you have. Caps may be needed on Mr.Bender and Applegate.
Used to work that way, but after the big FR crash & major fix a year or so ago, that's no longer the case. You can now use all lowercase and even leave out spaces.