Isekai Ojisan 1A = Yōsuke aka "Ojisan", 1B = "Sui" aka "Tsundere Elf". Sui's real name is complicated, and if Ojisan's YT channel was real I'd seriously watch it.
Edomae Elf. 2 = Elda. Props for her miko (not in the pic) for getting Elda-sama out of the shrine! On her own!
Isekai Shokudō. 3A = Aletta, 3B = Kuro, 3C = "Master". The series is about opening a restaurant, so they're the perfect staff for this pic.
Dungeon Meshi. 4A = Laios, 4B = Chilchuk, 4C = Marcille, 4D = Senshi. Senshi could help the Isekai Shokudō crew in a pinch. (Laios would be the taste tester.)
Mushoku Tensei. 5A = Rudeus, 5B = Sylphiette. I'm glad that we can't actually see Rudeus' face in this pic, he's probably being creepy.
DanMachi. 6A = Lyuu, 6B = Bell Cranel. There's probably some minotaur entering the restaurant, right now, with heart-shaped eyes, looking for their beloved Bell "Tomato Kid".
Sousou no Frieren. 7A = Eisen, 7B = Heiter, 7C = Himmel, 7D = Frieren. Of course Heiter is drinking, corrupt priest... and Frieren will probably agree for a second meeting in that restaurant, "soon", and then come back when they're already old.
For reference:
Pinging @[email protected] as he was wondering about the series in the pic.
I recommend reading #1 (Isekai Ojisan) - it's fun, the art is unique, and the MC Ojisan's antics are hilarious. The setting is also atypical, so it "feels" fresh and generally well-written. The anime adaptation rubbed me off the wrong way, I don't know why, but you might want to give it a try.
Synopsis: The series is about a 17yo Yōsuke going to isekai due to a coma, spending 20y there, and coming back to Earth as he wakes up from the coma. No work skills, his beloved Sega is gone, no home of his own, no more Sega games, the only relative supporting him is his nephew, Sega was sold to Nintendo... did I mention that the guy is obsessed with Sega? He still has the same powers as he had in isekai though, so he puts them to good use - making weird YouTube videos for a living.
Alright, so I see characters from Frieren, Danmachi, Mushoku Tensei, and Dungeon Meshi. However, I don't know off the top of my head who is on the right.