This is not a tax issue, don't frame it as such. I've seen people do crazy illogical things when they let the tail wag the dog on taxes. Generally speaking, taxes in the US will never result in bringing home less money as more is earned. Tax brackets are marginal, they only apply to each additional dollar earned not your entire income.
Your question is really about free time vs. money tradeoffs. Everything, including free time and money, has a utility curve with Diminishing Marginal Utility...that is, the more you have the less you value each additional unit. The sweet spot you're looking for is where utility for free time and money have started to flatten out, the point of diminishing returns. There is no universal function for this because it's very personal, though many studies suggest that $75k of household income is the point of diminishing returns for most. Many factors can affect this specific number in either direction (cost of living, number and stage of kids, etc.) so it's something you'll have to figure out for yourself.