(1-5-6m-4)  Examples below I’m Yours (Jason Mraz), Under the Bridge (RHCP), With or Without You - U2.

The audio sample here is in the key of C.  Chord sequence:  C | G  |Am | F

Jason Mraz - I’m Yours

Verse and chorus  1-5-6m-4 chords:    B | F# | G#m | E |    (in key of B).  Alternatively with capo on 2nd fret, use chords A | E | F#m | D |.

Red Hot Chili Peppers - Under the Bridge

After the intro, the verse uses  1-5-6m-4 chords:  E | B | C#m | A |     (key of E).

 U2 - With or Without You 

 In the key of D, using 1-5-6m-4 chords  D | A | Bm | G |  

Other Examples of this Progression

Bob Dylan - Don’t Think Twice It’s Alright 

Thirsty Merc - 20 Good Reasons