idk the other ones, but Mob Psycho 100 is similar to saiki k and mashle in terms of overall vibe
if you're into action-comedy then try:
Return Of The Mount Hua Sect
The Greatest Estate Developer
The Player Hides His Past
Special Civil Servant
Hero Killer
Murim Login
Best Teacher Baek
if you want celebrity manhwa then u should read:
Acting Genius, TOP Idol!
I Was Mistaken As a Monstrous Genius Actor
Saving the Doomed Idols With My Touch
I Became the Youngest Member of Top Idol
The Road to Glory
for debut or die, maybe assistant manager kim hates idols? as for gsgw (this is mostly vibes) maybe the painter who draws dungeons! and if ur open to a political fantasy maybe machasal ^_^
For mashle ig https://www.mangago.me/read-manga/sensei_bokutachi_ga_sekai_wo_horoboshimasu/ might be a bit similar?
For actions I got
https://www.mangago.me/read-manga/the_s_classes_that_i_raised/
And for some idol manwha return time bending I rly enjoy
https://www.mangago.me/read-manga/sounds_like/
You can try monochrome rumor if you like debut or die. Though it is a bl
recs similar to these: (mashle, debut or die, got dropped into a ghost story still gotta work, the evil ring, disastrous life of saiki k, illusion hunter from another world, and im a young god won’t you raise me?)
tysm fellow magicians (๑•ㅂ•)و✧