That was the online grave information I also found and as the right George was mentioned there it definitely appears to be the right dates.
A bit of searching around and I don't think Edward is the father or the brother but may well be a cousin? I think I have potential parents for him of Richard & Elizabeth and a potential birth in Rowington but no sibling James
Family search online gives potential parents of James Taylor as:
1. 22 Apr 1777 SAINT PHILLIPS,BIRMINGHAM,WARWICK,ENGLAND - John Taylor & Martha
2.16 Jan 1778 SAINT PHILLIPS,BIRMINGHAM,WARWICK,ENGLAND - Richard Taylor & Mary (also had son William 1770)
3. 15 Aug 1778 St. Martin, Birmingham, Warwick, England - James Taylor & Ann Taylor
As Richard & Mary's younger children were born in Rowington this may fit as I believe that's closer to Street on Dunsmore than what St Phillip would have been? This could have accounted for a move closer to where James married firstly Mary Russell and secondly Sarah Johnson. If Edward above was born in Rowington then they could well be related somewhere along the line
One christened 177 with parents Samuel & Susannah also has a death of 1778