Start with the holy trinity of zooms:
16-35mm F/2.8 II
24-70mm F/2.8 II
70-200mm F/2.8 II
and fill in with primes in the lengths you find you shoot the most.
Remember, all of these can be stopped down to F4 but F4 glass can never go faster
This is what I'd do. Add the 50mm f/1.4 (or if money no objection, judging by the 24-70 mk II inclusion) go all out with the 50mm f/1.2L and also add the 100mm f/2.8L IS USM Macro.
That set should pretty much cover anything you can think of. Spruce it up with extenders and filters as needed.