The best option is to have the 16-35 II , 24-70 II and the 70-200 2.8 II. With this three lenses you can do 90 percent of all jobs.
... and you have to have a lot of jobs to pay for these :->
Btw the "best" is a difficult term, maybe the best 3-lens combination, but certainly not the best size, weight, stealth or open aperture.
Eventually I would love to have both of these however I can only purchase one of them at this time.
You probably realize that "portraits and indoor shoots" don't square, or get the 28-300L. However, your choices of fast standard zooms are much more limited, essentially the Canon 24-70 mk1 & mk2 and the Tamron. So if you find one of these attractive you won't regret it later. For tele or 85mm+ portrait range, there are a lot of other options, Canon or 3rd party, primes or zooms - so it's a more difficult choice, the 70-200 lenses are just one good option among others.