Al-Dar, a slightly less expensive alternative comes in as a close second. Located in the busy neighborhood of Eaux-Vives, Al-Dar's menu boasts numerous starters, it certainly provides enough choices for a full mezze meal and their hummus is easily the best I've had in Geneva.
Pictured below: kebbeh, vine leaves, cheese pastries, mutabal and their scrumptious, creamy hummus.