Looking at our fixtures from 1985 (when we went down to the third tier again but didn't come back up) until 2003.

Including league and cup (not Welsh cup), the teams we played most frequently were:

Swansea Town (29)
Northampton Town (26)
Blackpool, Exeter City, Scunthorpe United, Leyton Orient (including 2 as Orient) (22)
Brentford, Leyton Orient, Rochdale, Mansfield Town (20)
Plymouth Argyle, Wrexham (19)
Chesterfield, Colchester United, Hartlepool United, Hereford United, Lincoln City, Peterborough United (18)

In those barren years, we faced 69 different sides in the bottom 2 divisions.

Currently 5 of those 69 are in the Premier League, 16 are in the Championship, 14 are in League 1, 16 are in League 2, 10 are in the National League while 7 of the other 8 are below that in the pyramid, with Bury having gone to the wall.

20 of those 70 sides have played in the Premier League, while 34 have played in the Championship. We've met 33 of those 34 sides in the 2nd tier since 2003.

The remaining clubs we played in the league between 1985-2003 that we haven't faced since are as follows:

Aldershot
Barnet
Bristol Rovers
Bury
Cambridge United
Carlisle United
Cheltenham Town
Chester City
Chesterfield
Darlington
Exeter City
Halifax Town
Hartlepool United
Hereford United
Kidderminster Harriers
Leyton Orient
Lincoln City
Macclesfield Town
Maidstone United
Mansfield Town
Newport County
Northampton Town
Notts County
Oldham Athletic
Oxford United
Port Vale
Rochdale
Scarborough
Shrewsbury Town
Stockport County
Swindon Town
Torquay United
Tranmere Rovers
Wrexham
Wycombe Wanderers
York City