Deadman #1 (1985) – This series reprints Strange Adventures #205-216 and Brave and the Bold #79 & #86.
Deadman #2
Deadman #3
Deadman #4
Deadman #5
Deadman #6
Deadman #7

Deadman Vol. 2 #1 (1986)
Deadman Vol. 2 #2
Deadman Vol. 2 #3
Deadman Vol. 2 #4

Swamp Thing Vol. 2 #49
Swamp Thing Vol. 2 #50
Swamp Thing Vol. 2 #51

Action Comics #602 – Read the Deadman backup stories only.
Action Comics #603
Action Comics #604
Action Comics #605
Action Comics #606
Action Comics #607
Action Comics #608
Action Comics #609
Action Comics #610
Action Comics #611
Action Comics #612
Action Comics #613
Action Comics #614
Action Comics #615
Action Comics #616
Action Comics #617
Action Comics #618
Action Comics #619
Action Comics #620
Action Comics #621
Action Comics #622
Action Comics #623
Action Comics #624
Action Comics #625
Action Comics #626

Deadman: Love After Death #1 (1989)
Deadman: Love After Death #2

Deadman: Exorcism #1 (1992)
Deadman: Exorcism #2

Batman/Deadman: Death and Glory #1 (1996)

Deadman: Dead Again #1 (2001)
Deadman: Dead Again #2
Deadman: Dead Again #3
Deadman: Dead Again #4
Deadman: Dead Again #5

Deadman Vol. 3 #1 (2002)
Deadman Vol. 3 #2
Deadman Vol. 3 #3
Deadman Vol. 3 #4
Deadman Vol. 3 #5
Deadman Vol. 3 #6
Deadman Vol. 3 #7
Deadman Vol. 3 #8
Deadman Vol. 3 #9

Wednesday Comics #1 (2009) – Read the Deadman stories only.
Wednesday Comics #2
Wednesday Comics #3
Wednesday Comics #4
Wednesday Comics #5
Wednesday Comics #6
Wednesday Comics #7
Wednesday Comics #8
Wednesday Comics #9
Wednesday Comics #10
Wednesday Comics #11
Wednesday Comics #12

Blackest Night: Batman #1 (2009)
Blackest Night: Batman #2
Blackest Night: Batman #3

Phantom Stranger Vol. 2 #42

Read Brightest Day here.

Flashpoint: Deadman and the Flying Graysons #1 (2011)
Flashpoint: Deadman and the Flying Graysons #2
Flashpoint: Deadman and the Flying Graysons #3

DC Universe Presents #1 (2011)
DC Universe Presents #2
DC Universe Presents #3
DC Universe Presents #4
DC Universe Presents #5

Justice League Dark #1 (2011)
Justice League Dark #2
Justice League Dark #3
Justice League Dark #4
Justice League Dark #5

I, Vampire #6

Justice League Dark #6
Justice League Dark #7

I, Vampire #7

Justice League Dark #8

I, Vampire #8

Justice League Dark #9
Justice League Dark #10
Justice League Dark #11
Justice League Dark #12
Justice League Dark #13

Justice League Dark Annual #1 (2012)

Justice League Dark #14
Justice League Dark #15
Justice League Dark #16
Justice League Dark #17
Justice League Dark #18

Swamp Thing Vol. 5 #13

Swamp Thing Vol. 5 Annual #1 (2012)

Swamp Thing Vol. 5 #14

Justice League Dark #19
Justice League Dark #20
Justice League Dark #21

Phantom Stranger Vol. 4 #4

Phantom Stranger Vol. 4 #6

Phantom Stranger Vol. 4 #8

The Flash Vol. 4 #27
The Flash Vol. 4 #28
The Flash Vol. 4 #29

Justice League Dark #23.1 – The Creeper
Justice League Dark #23.2 – Eclipso

Read Trinity War here.

Read Forever Evil: Blight here.

Justice League Dark #30
Justice League Dark #31
Justice League Dark #32

Secret Origins Vol. 3 #6

Justice League Dark #33
Justice League Dark #34

Justice League Dark Annual #2

Justice League Dark #35
Justice League Dark #36
Justice League Dark #37
Justice League Dark #38
Justice League Dark #39
Justice League Dark #40

Constantine: The Hellblazer #11