Colorado requires disclosure of base salary, so you can look at Colorado job listings at https://google.com/careers to get a ballpark idea. This works for other large companies, too.
Of course, pay varies by location, and compensation includes more than just base salary, but it will give you a starting point.
I'm a fan of Levels.FYI, but you notice the rather large standard deviations for a number of pay grades, and it is self-reported which means the sample may not be representative.
and I haven't found anything better than levels.fyi
They do? I'd love to see that if you have a link.