I would say the true meta at the moment for D4 content is probably Ogre SHM/PAL/CLR, it does considerable dps and is top line in mitigation, sustain and healing. You can swap the shm or pal for another support or tank too without losing much and be D4 capable but it will be slightly worse imo since those 3 classes combine extremely well together.
Any combo with a tank (even a monk or a ranger/zerker) and a cleric or shm is going to have a fairly easy time getting into D2 raids at a minimum though and start unlocking other classes.