| Leigh Dragoon | | 2018 | plot, script | | 3 |
 | Len Wein | United States | 1991–1992 | plot, script | | 3 |
| Leonardo Venturo | | 2009 | plot, script | | 3 |
| Leopoldo Sorrentino | | 2011–2013 | plot, script, pencils, ink | | 3 |
| Linda Schipper | | 2025 | plot, script, pencils, ink | | 3 |
| Lisa Marsoli | Italy | 2015–2017 | plot, script | | 3 |
| Lisette Morival | France | 2003–2006 | plot, script | | 3 |
| Loris Cantarelli | | 2004–2013 | plot, script | | 3 |
| Luca Baino | | 2026 | plot, script | | 3 |
| Luca Galoppo | Italy | 2001–2005 | plot, script | | 3 |
| Luca Negri | | 2024 | pencils, ink | | 3 |
| Luca Raina | | 2021–2023 | plot, script | | 3 |
| Luca Vizzotto | Italy | 1978–1979 | plot, script | | 3 |
| Luciano Vecchio | | 2025 | pencils, ink | | 3 |
| Luisa Russo | | 2019 | pencils, ink | | 3 |
| Lumi Nolan | | 2021 | plot, script, pencils, ink | | 3 |
| Lurdes Martin | Spain | 1993 | pencils | | 3 |
| Lynn Barker | United States | 1991–1993 | plot, script | | 3 |
| Lynn Karp | United States | 1947–1958 | pencils, ink | | 3 |
| Marcelo Milani (Italy) | Italy | 1988–2001 | plot, script, pencils | | 3 |
| Maawillustration | | 2019 | ink | | 3 |
| Maggie Thompson | | 1997–2026 | plot, script | | 3 |
| Magnus Magnusson | | 1974 | plot, script | | 3 |
| مجدي نجيب (Majdy Najeeb) | Egypt | 1967–1972 | plot, script | | 3 |
| Malaga | | 1984–1986 | pencils | | 3 |
| Manfred Härtel | | 1988 | plot, script | | 3 |
| Manuel Preitano | | 2022 | pencils, ink | | 3 |
| Marc Lechuga | | 2019 | plot, script, pencils, ink | | 3 |
 | Marcello Bondi | | 2016–2023 | plot, script | | 3 |
| Marco Leoni | | 2020 | pencils | | 3 |
 | Marco Ponti | Italy | 2012–2021 | plot, script | | 3 |
| Marcos Marcelino da Silva | Brazil | 1981–1982 | pencils | | 3 |
| Marianne Ling | | 2004–2005 | plot, script | | 3 |
| Marika Harjumaa | | 2013 | plot, script | | 3 |
| Mario Igor Vargas | Chile | 1970–1971 | pencils, ink | | 3 |
| Mario Mortara | | 1935 | plot, script | | 3 |
| Mark Armstrong | | 1982–1987 | pencils, ink | | 3 |
| Mark Benecke | | 2008–2021 | plot, script | | 3 |
| Mark Marderosian | United States | 1992 | pencils | | 3 |
| Mark McKenna | United States | 1997–2003 | ink | | 3 |
| Marketta Harju-Autti | | 2005–2017 | plot, script | | 3 |
| Markus Corrêa | Brazil | 2000 | plot, script | | 3 |
| Markus Golschinski | | 1980–1983 | pencils, ink | | 3 |
| Martin Jurgeit | | 2011 | plot, script | | 3 |
| Martin Lhotzky | | 1997–2001 | plot, script | | 3 |
| Martin Wimmel | | 1977–1980 | plot, script | | 3 |
| Mary Wilshire | United States | 1994 | pencils | | 3 |
| Massimo Rossi | Italy | 1976–1978 | plot, script | | 3 |
| Mathilde Domecq | | 2019 | plot, script, pencils, ink | | 3 |
| Matthijs Hamers | | 2025–2026 | plot, script | | 3 |
| Mauro Bruni | | 1997–2002 | plot, script | | 3 |
| Mega | | 2009 | plot, script | | 3 |
| Menno Wittebrood | | 2025 | pencils, ink | | 3 |
| Michael Fry | | 1994 | plot, script | | 3 |
| Michael Horowitz | United States | 1991–1993 | pencils, ink | | 3 |
| Michael Naiman | | 1997–1998 | plot, script | | 3 |
| Michael Werner | | 2008–2011 | plot, script | | 3 |
| Michael Wettendorff | | 1998–2000 | plot, script | | 3 |
| Mike Coleman | United Kingdom | 1991–1993 | plot, script | | 3 |
 | Mike Mignola | United States | 2001–2009 | plot, script, pencils, ink | | 3 |