too bad actually you come very late with this as there is 1 way to remain unbanned, without downgrading, but as of time of writing & posting this, my account which is rank 999 with everything unlocked, survived any and all past ban waves, and also is perfectly fine right now, doing any of this would result in a ban no matter what today.
but it's simple, leave the account inactive for long enough after you done everything, and be surprised that it will have survived the ban waves, needlessly to say, don't ever mod on that account ever again to stay that way.