Too bad this is at the bottom, as many of the comments would be different if they saw this first. You can probably get by without private banking, but there might be some ideas you'd miss out on ("real estate is about to go on a tear" or "get out of oil/gas" that would be well-known in certain circles before they are well-known the general public.
If you are in index funds that's great, but the question of which index funds you're in is also important. With high 7 figures, you can allocate a decent chunk to various different verticals (in a way that you really can't with under a million.