I have researched my Jewish roots in great detail, and there is nothing very Jewish that I can see in the generations of your family we've seen so far.
The fact that your gggf, Benjamin George Taylor, named one of his sons Benjamin is a fairly obvious case of Christian naming practice. Jewish children were (are) given the name of deceased relative, never of a living one.
The IGI records the baptism of a Benjamin George Taylor in the Old Church, St. Pancras on 12 Jan 1835 (birth 29 Dec 1834), son of John and Mary.
A Benjamin Taylor married Emma Fooks in the same church on 25 Dec 1859.
You do really need to get some birth/marriage certs to move forwards (or backwards) with any certainty.
Justin
PS My mum's dad's ashes were interred in Golders Green cemetery. He was most definitely not Jewish; maybe someone in your family has jumped to some false conclusions.