To a large extent Wirral2013, the question of so-called, good boarding houses at Eton College simply doesn’t exist. Given that the physical appearances of all the 25 Eton houses are unique to each other, but to all intents and purposes, “They are all the same”, at least according to my DS.
The exception, perhaps, is College which is the first and oldest house at Eton. Even that, Collegers are now housed mainly at the New Buildings which were the later additions to the original 5¾-century-old Eton architecture. It is also the only house located inside the main School! DS was at College and in his time he had many Oppidan friends scattered amongst the 24 oppidan houses that he visited often. I once asked him which house he thought was the best and he replied with the above answer.
Other than the scholars and bursary holders, all paying parents pay the same money at Eton and therefore, the facilities and services offered by the school are the same. Again, the here is the King’s Scholars who dine at College Hall with the standard of food served there the equivalent to that of a four or five-star hotel’s or better!
Instead of looking for a futile good boarding house at Eton, I would suggest it’s more practical looking for a suitable Housemaster and/or Deputy Housemaster (who could be more involved with your son than the busy Housemaster) that your son can really relate to and benefit from either by way of mutual interests in academic subjects, music, sports, etc.
Have a look at the following Housemasters/Deputy Housemasters and cross check what are their subject specialities that your son might work harmoniously with.