What would you all do?

I have approximately $90,000K Im looking to invest. I have $170K in VOO and I would like to diversify some versus adding to the VOO. I’m 38, and looking for low expense ratio index funds, my brokerage is through vanguard. Ideally I would dump the $90K in a different fund (possibly VT) invest $400 monthly into each fund (VOO) and (the new fund possibly VT) versus the $800 a month I put into VOO now, to spread it out some Where my money is. Does anyone have recommendations? While I understand past performance vs future projection is silly to look at, however it’s hard to ignore VOOs 80% gain vs VTs 50% gain over the last 5 years. What would you all do in my situation? I’m looking for steady long term growth but can stomach some volatility. Thank You!