[m] I'm looking for isekai type manga with male main character and I'd prefer it if he didn't fall in love with anyone during it but if he does just very little romance preferably the mc will not be weak also reincarnation and time travel of a sort is also fine please let me know

No harem

The Blood Reaper

isekai, male lead...and NO harem? DOES SUCH A THING EVEN EXIST!?!

...oh, I found some!
Kamitachi ni Hirowareta Otoko
The Wrong Way to use Healing Magic
Doryoku Shisugita Sekai Saikyou no Butouka wa, Mahou Sekai wo Yoyuu de Ikinuku
Hitoribocchi no Isekai Kouryaku
Kenja no Deshi wo Nanoru Kenja
Isekai Yururi Kikou: Kosodateshinagara Boukensha Shimasu
Gaikotsu Kishi-sama, Tadaima Isekai e Odekake-chuu
Yankee Wa Isekai De Seirei Ni Aisaremasu

I've read a few of those I wish they updated faster though

The Blood Reaper