>>4011435Anytime
The continuation work of that fic (Cache by the same author) is also interesting. But this one is on Alastor pov, it's /slightly/ less "silence" and still ongoing. Worth the read though.
The tag (something like "Vox one-sided psychosexual obsession" or so, it is in the shared fic) allegedly has fics with a stronger radioSILENCE dynamic so you might want to try there. The one shared is a personal favorite, I haven't read one as good as this one yet (the emotional devastation of that one and how much the reader is invited to empathize with Vox hits it with me. If that's what you're looking for, good luck. Feel free to share your findings with that tone too).
I've found this one also interesting, but it's very much a dead dove (cannibalism, gore and sex take place at the same time). The catch on this one is that it's quite canon divergent and the different power dynamics were not absolutely my cup of tea. Read tags to see if it might be your thing: "once bitten, back for more", by princeliest (
https://archiveofourown.org/works/55536184)
Same author also has a series called 6.66 live on air that is not as unrequited, but has an Alastor with very low empathy and is often repulsed by Vox. Much lighter works than the previous share, even though same author.