Thank you for another challenge.
Each of the tunes you mention do indeed use the same progression although in different keys. There are also some variations within the different songs that make the progressions use novel in each instance.
This uses the progression Ebmin/Bb - Cb major (D#min/A# - B major)
The first chord appears to be the home chord or chord i. So the progression is best described as i/5 - bVI
[mp3]http://www.bandcoach.org/fp/audio/jlex-01.mp3[/mp3]
This uses the progression Dmin - Bb major and sometimes Dmin/A - Bb major
The first chord appears to be the home chord or chord i. So the progression is best described as i - bVI and i/5 - bVI
Version 1
[mp3]http://www.bandcoach.org/fp/audio/jlex-02.mp3[/mp3]
Version 2
[mp3]http://www.bandcoach.org/fp/audio/jlex-03.mp3[/mp3]
This uses the progression Cmin - Ab major/C and Cmin/G - Ab major. the progression then modulates (changes key center) to Dmin - Bb major/D and sometimes Dmin/A - Bb major
In both keys, the first chord appears to be the home chord or chord i. So the progression is best described as i - bVI/1 and i/5 - bVI
The key difference is the rhythm used:
The chord i is played for the first 3 beats and chord bVI is played on the last two 8th notes with an accent.
Version 1
[mp3]http://www.bandcoach.org/fp/audio/jlex-04.mp3[/mp3]
Version 2
[mp3]http://www.bandcoach.org/fp/audio/jlex-05.mp3[/mp3]
Lastly here are all three progressions put into the same key
[mp3]http://www.bandcoach.org/fp/audio/jlex-06.mp3[/mp3]
In each of the 12 keys, the progression would be
Dmin/A - Bb
Emin/B - C
Fmin/C - Db
Gmin/D - Eb
Amin/E - F
Bmin/F# - G
Cmin/G - Ab
C#min/G# - A
Ebmin/Bb - B
F#min/C# - D
G#min/D# - E
Bbmin/F - Gb