I can get some of them:I am always amazed how many opposition fans apart from the usual suspects consider us rivals (to varying degrees).
SCBC
Villa
Man C
EFC
Watford
LFC
Etc etc
Villa - for a while were we trading places with them in the league
EFC - Same as above but we always had the upper hand apart for that time in the 80's when they probably had the best team in the league only for Liverpool get all English teams banned from Europe.
Watford - Is full of Woolich fans, prior to them getting promoted to PL many had Woolwich as their 2nd team, talking youngsters here.
LFC - I think this is a very recent thing and us finishing above them for almost a decade now has really pissed them off, also it seems more of an online thing. Met up with many in Madrid and never felt anything like a rivalry there, quite the opposite in fact. Whereas online it's totally opposite.
Not sure about the South Coast Baptist Club though.