Re: Merrie England? Any like?
Personally I think the 'nostalgia' comes from Tolkien writing as if he was penning a translation. Gives the impression of depth and comes, without a doubt, from his philological background.
I'm sure Tolkien would have admitted that William Morris and ER Eddison were his key influencers in this - other than the old sagas themselves. Their language is a bit more fanciful but if you can get round that they might appeal - would recommend Water of the Wondrous Isles by Morris first and foremost but others on the Morris thread might disagree.
Can't think of any post Tolkien writers that achieve this at all; not in fantasy anyway.
I'd check out Out of the Silent Planet and Perelandra by CS Lewis as well, if you like the more famous Narnia books.