I've been waiting all day for a moment to post a response. My apologies in advance 
As I mentioned on a thread last year I did my dissertation on Wuthering Heights and Tenant
In so far as WH goes I believe that I was very taken by some of the language, but then when I read it 7 years later, could only see it as an abusive relationship.
But Anne Bronte got there before me, and probably influenced that thought.
Both Charlotte and Anne were deeply shocked by Wuthering Heights
In fact, Tenant was written as a direct response to Heights and probably would not exist without it (note the house names)
Anne had been a governess in private households and with her book is basically saying "The likes of Heathcliff romantic? No! THIS. This is what a marriage to a man like Heathcliff looks like!"
Charles Kingsley said of it "every man should read it and every man should prevent his wife from reading it"
It was, and remains, very ahead of its time. An early feminist piece.
The reason its never seemed to rank as highly as Jane Eyre or WH is largely thanks to Charlotte.
If Charlotte was disturbed by WH, she hated Tenant largely perhaps because the content (at that time) would have been unseemly from a young unmarried woman. After Anne's death, Charlotte deliberately suppressed further republishing of Tenant for many years.
And that, is my lecture of the day