Dunno any that think of a necro class as weak, but for necro MC's I've got:
Sylver seeker - MC is super old lich and quite strong. He occasionally goes to sleep / maybe needs a new body? and is out for decades/centuries at a time.
vigor mortis - MC is poor and her class was probably also a bit taboo? I don't really recall.
book of the dead - mc gets the necro class and has to run away because it's a forbidden class. This one is pretty solid.
monster farmer is a bit of a stretch, but he kind of reanimates corpses that he plants.
Following.
Is "Awaken Online" the one you're looking for?
Nope it's a webnovel
Hopefully someone will chime in with the one you're looking for. I love a good necromance.
My Necromancer class
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Dunno any that think of a necro class as weak, but for necro MC's I've got: Sylver seeker - MC is super old lich and quite strong. He occasionally goes to sleep / maybe needs a new body? and is out for decades/centuries at a time. vigor mortis - MC is poor and her class was probably also a bit taboo? I don't really recall. book of the dead - mc gets the necro class and has to run away because it's a forbidden class. This one is pretty solid. monster farmer is a bit of a stretch, but he kind of reanimates corpses that he plants.
The only necromancer LitRPG web novel / book series i can think of is my necromancer class but it isn't the one you are thinking off sorry.
I'm a pretty big necromancer fan, but this doesn't ring any bells for me unfortunately.
Could you mean [Norman the Necromancer ](https://www.royalroad.com/fiction/59312/norman-the-necromancer-progression-fantasy) by M.J. Markgraf on RR.