It does have lots of others, from the home page archive.org type in the search box - parish registers- and there's a list of what they have - pages full! Lots are Phillmores marriages but there are bapt etc too.
Another idea - parents George & Sarah Russell also had other children baptised in Sedgley just in case names mean something (or not!), from familysearch.org again - their source Bishops Transcripts Sedgley
John 9 Oct 1788
John 8 Nov 1788 (first John may have died?) - this baptism and the first John are also on freereg.org where it shows George abode Cottd, occupation nailor
Paul 18 Sep 1791
You never know there could be a clue.
Also on freereg.org there is another Willm. bap Sedgley 21 Sep 1783 father John Russell abode G.Wood occupation shoemaker, mother Eliz. There is however a burial for a William in Sedgley 11Apr 1852 aged 68 so this may well be that William
Shirl