On success, we've been more successful overall than Blackburn in the last 30/40 years having won more trophies and amassed more top flight points. Same as for Sunderland and Toon.
So on the success front we are bigger than Rovers Toon and Sunderalnd, since let's say 1980 for a starting point, but you can go back earlier if you like. We have a far bigger fanbase tthan Rovers or Sunderland, and a larger one than Toon.
So we're bigger clubs than all three in that respect too.
Basically we are a bigger club than Rovers, Toon and Sunderland, in terms of trophies won and in terms of global and domestic support.
Relevant points tables
http://www.statto.com/football/stats/england/premier-league/all-time-table/pl-years
Bit of a surprise and disappoint for Sunderland I'm sure to be behind Fulham
All-time table
Sunderland do better there, but all three still behind Spurs
http://www.statto.com/football/stats/england/premier-league/all-time-table/full
all-time trophy table
http://www.krysstal.com/trophies.html
Again Spurs head all three,
Sunderland behind Rovers, a bit of a surprise that, still Rovers have actually won a couple of trophies since 1973, Sunderland's last time they disturbed the trophy cabinet.
Current UEFA rankings
http://kassiesa.home.xs4all.nl/bert/uefa/data/method4/trank2012.html
Another clean sweep for Spurs - the other three teams way behind our 27th,
Rovers at 99th and, AFAICS Toon and Sunderland are nowhere in the top 100, residing in the also rans alongside Gillingham, Charlton, whoever.
All time Club rankings
http://www.clubworldrankings.com/100.htm
Spurs 40 th - way in fron of the other three thhis time Rovers and Sunderland don't even trouble the Top 100, Too lagging way behind at 90th
Conclusion
Spurs are bigger than Rovers, Toon or Sunderland