it's not really hard if they're sleeping lol, plus it's not as if the uchiha are all that, they're pretty much fodder for the most part. itachi took down three of them with punches.
anyway, i'd guess the best at it would be a. zabuza with mist and silent killing b. muu with invisibility and kunai c. minato by rigging the place with markings, he'd be done in a minute.