Yeah, not much opportunity for a tax break with such high income.
With such a salary though, there might be a remote chance that your employer offers a Deferred Compensation Plan (DCP, 409a), where you can put aside some of your salary and/or bonuses pre-tax, let it grow, and the day you early-retire (with your crazy high savings, this can't be that far?), you get such money back over a few years, and it will then be taxed much lower because of your new tax bracket. This could strongly lower your current taxes... This also provides cash for the first few years of retirement, hence allowing your portfolio to keep growing untouched. Very good deal.
Now this is quite a bet that you have to think twice about (as Enron or Nortel execs painfully discovered), as if the company goes bankrupt, you can say 'bye bye' to such deferred revenue.
If your company doesn't provide any such plan, the 401k provider (Fidelity or else) probably does, so you may want to lobby your company to introduce such benefit...