I haven't read the full thread. My name and my DCs are probably on here somewhere.
Anyway: Oscar, Olive, Oliver, Olivia - not sure why, but olive being an actual food (that I'm not keen on) and Oliver containing 'liver' probably contribute.
Archie, Stanley, Albert - I know they're all very popular right now, but they seem weird to me on little kids. One is also the name of a very nasty family member.
Anything with a hyphen.
Most surnames as first names, e.g. Riley, Cooper, Parker, Harper, Carter - especially on girls. There are plenty of other nice gender-neutral names, e.g. nature names, if that is what you want. Most of the above just sound ugly to me.
Names that have been engineered just so that the parents can use a certain nickname or unrelated name, e.g. (and you won't find this in any thread here because it's just an example): wanting to call the baby Lara and asking if Hilary would be OK for the birth certificate. Or wanting to call her Bunny and wondering if Naomi is suitably close in sound.