Hmm, I'm rather wondering why someone would suggest Wisteria floribunda - it's just as bad as all the others, needs pruning twice a year and will get rampant, which is why it'll need pruning twice a year just the same as all the rest.

I don't know what part of the country you're in, but so long as its not somewhere very northerly where it gets bitter cold a lot of the time, have a look at Trachelospermum jasminoides - bit slow to get going, but once it does, will provide evergreen cover, fragrant white flowers in summer, and won't need pruning other than keeping it tidy round windows, etc. Likes full sun, so a south facing wall is ideal.

unfortunately I agree with Bamboo they all need pruning . even if you buy one in flower the next seasons growth will need cutting back.