Going by https://www.federalreserve.gov/releases/lbr/current/ and JumpCrisscross's link, the banks that failed would have been around ~16th largest US bank at the time of failure. I don't know how large Washington Mutual was at the time failure compared to other banks, but just doing straightforward inflation adjustment would put it at #10, and I suspect it's closer to #5 or #6.

> were largest failures not largest banks failing

Correct. The comment I responded to claimed unlimited coverage was limited to the Big 5. We're less than a year from non-TBTF (we let them fail for god's sake) non-big-five banks (a) failing and (b) receiving unlimited depositor coverage.