I agree, he is very elusive

Is he the Edward HOCKSWORTH age 71, death registered in Leeds 1910?
MARRIAGE on FreeBMD: Jun Qtr 1869, Hunslet 9b, page 364 (the page nr is very clear)
Ann HEATON (there is another bride on same ref nr, page 364 but no grooms are indexed there)
Edward HOPWORTH Jun Qtr 1869, Hunslet has been indexed by FreeBmd as page 361, but looking at the blown up image of the page, I believe it should be 364 - part of the 4 is very faint and looks nearly like a 1 (other 4's on the same page are the same). The page he is indexed as being on (361) has 4 grooms and 2 brides showing. I would hazard a guess that he and one of the other grooms both belong on page 364. Which would leave page 361 with 4 names and show 364 as having 4 names.
The children? Birth Registrations on FreeBMD:
Elizabeth Ann OCKWORTH - 1870 Hunslet
Rebecca HOCKWORTH - 1872 Leeds
Sarah Jane HOCKWORTH 1875 Leeds
? Edward HOPWORTH 1879 Leeds
Ada HOCKWORTH 1886 Leeds
You mentioned your direct line was son Edward (1882).
He was already on the 1881 Census, age 2. And age 12 in 1891.
Cheers
AMBLY