Chris Phillips's Medieval Genealogy site has a good list of sources on the net. But they don't come with a star rating for reliability.
With manorial families, look for a Victoria County History article on the parish. Google "bho vch anyshire" to get started. Coverage is very patchy, but the articles cite the primary sources and have no ulterior motives.
For political families History of Parliament is a goldmine.
Often there are older county and parish histories, but these are much more variable. Burke's Landed Gentry is also worth looking at. But treat these as background reading. Many gross errors and blatantly fake pedigrees are in circulation in these channels.
Family histories compiled by descendants always come with a big danger sign. Never assume they have inside information.
For Visitation families, wills are the best source. There are millions of them, but no national index. The PCC wills are online, but most wills have to be hunted down and got from county archives.
As Chase says, Visitation books are a mixed bag. Some books just publish a manuscript, or a collation of manuscripts, but in others, the editor has added in a lot of his own research or a lot of other pedigrees from other sources.
And the manuscripts themselves often have a complex history with additions and other doctorings. And in some cases the actual Visitation informant was confused or presented a fake pedigree. More good background reading.
Having said which, Visitations are often used as primary evidence, but judiciously.
And of course WikiTree is a work in progress. If nothing is done provisionally then nothing gets done at all. No harm is done so long as sources are cited - the trouble only starts when sources are overrated.