You'll have loads of choices. The pieces you have listed are lovely, but don't forget you're getting married - the music should be celebratory and upbeat. Your music should let the congregation know something big is happening. Marriage is a big step.
I wouldn't be including a Requiem as that is 'for the repose of the souls' unless you are remembering someone deceased in which case it could be used at the Offortory. And even at that, I would personally would choose Fauré Requiem as opposed to Lloyd Weber - but that's just me.
With a quartet, you should have Spring from Four Seasons - Vivaldi. Arrival of the Queen of Sheeba, Include an Ave Maria ... loads of choices out there.
Best of luck with it.