Get an Apple Watch.
Obviously a bit tongue in cheek as not everyone can afford it, but my phone hasn't made a sound for 7 years and I love it so much.
Also, my colleagues phone blares out We are the Champions EVERU FUCKING TIME it rings and it fucks me off no end, so I think alerts can be selfish AF (whilst I appreciate that people are more concerned re dings than ring tones here)
I much prefer it and I use it too and it's good... but it can have issues too. Particularly around auto switching to a longer word. It should never, ever do this. Drives me crazy. But, I did try going back to the Apple keyboard after the new iOS but it sucked so hard I gratefully ran back to SwiftKey