They’re not the kind of names I would actually use personally, but I like [name_m]Rafferty[/name_m] and [name_u]Remy[/name_u]. Aside from that…R names just don’t appeal to me much. I hadn’t realized it until I read through the list you included!
I think r is a soft letter, like you said. Otherwise I don’t really know why I find it appealing, though. Maybe it reminds me of red, my favourite colour.
From your list I like [name_u]Roan[/name_u] and [name_m]Robert[/name_m] (my dad’s name, so I have a soft spot for it)
Other names I like
[name_m]Rafferty[/name_m]
[name_u]Rowan[/name_u]
[name_m]Roman[/name_m]
[name_u]Ryan[/name_u]
[name_m]Rylen[/name_m]
[name_m]Randall[/name_m]
[name_m]Redmond[/name_m]
[name_u]Rhys[/name_u]
[name_u]Rory[/name_u]