Personally, I love all British accents
You are obviously a person of good tastes and breeding. Naive, perhaps, but of of good taste. Some British accents sound harsh and/or odd even to other native British people. They conjure up certain stereotypes; 'Brummies' (from Birmingham and the wider Black Country) are seen as slow, friendly and slightly thick, 'Geordies' and 'Mackems' (North-East, Newcastle and Sunderland) are drunken party-animals, West-Country (Wiltshire and the South-West) are slow, backward yokels who get drunk on cider and chew straw. I speak as one whose accent is generally fairly RP, but reverts to West Country when I have a drink or two.
RP (received pronunciation), by the way, is the classic old black-and-white BBC newsreader English accent, and is often regarded as being 'posh' even though it is really not. It is, rather a deliberate non-accented way of speech.
and, yeah, when compared to American accents, they do sound higher class--even when they're not. Look at how often Micheal Caine get's cast in posh roles in American movies. His cockney may be tempered but it's still there. Perhaps it's cultural conditioning?
I would add the example of Dame Maggie Smith, whose natural accent is not terribly posh but generally seems to be picked to play 'posh' women.
I find it funny how often I've seen the goblins described as having "posh" accents. Yeah, they sound British, but they sound like gritty thugs. lol I think it gives them a lot of character.
If those goblins are posh, I hate to think what the social position of the rest of us is.