Oh come on. You call those mild? Pitiful. Here are some truely milquetoast swear words.
Bah! Bah humbug! Billions of blue-blistering barnacles! Blast! Blasted Botheration By thunder! Confounded Confound it Consternation! Curses! Dadgum! Dash it all! Doggone it Egad! Fiddlesticks Gad! Good Gravy! Go to thunder! Jeez Oh, crumbs Tarnation The deuce! The dickens! Thunderation! What the blazes! Ye gods!
Not being British, I can't say how strong these are, but Americans don't seem to take them very seriously. Blinking Bloody Bugger Flipping
Don't forget about all those Mild Exclamations, either.