I auditioned all of them, and I’m currently using “Chord” for incoming email, as I like it better than the old custom tone I was using for that purpose.
I have certain custom tones which I’ve used for well over 10 years, particularly the AT&T Merlin ringtone as featured on the TV show “24.” There’s also a custom chime that I use as the default text notification tone, which is very easy for me to hear even at lower volumes.
As an aside, I am also not thrilled with the new system notification tone, as it is rather quiet compared to the tone used in iOS 16 (and earlier). As far as I know, this cannot be customized by the end user, so I’m stuck with it, as is everyone else on the planet running iOS 17. I’ve always thought this limitation was rather odd, but clearly that’s by design.