The character I'm playing currently is a Fighter, and he's the "Wizard" of the party:
He's an Avowed from Candlekeep, he's a Psionic Fighter, he has Str 16, Int 16 and Con 8 (he's made of crystal -- I used the custom race from Tasha's, no homebrew at all).
He's the knowledgeable one of the group when it comes to history and especially arcana. He has a magic item that allows him to do a couple of utility spells, and for 4th level he'll learn Ritual Caster, to fill in for having no Wizard.
Party is: Bard, Warlock, Monk, Eldritch Knight and Psionic Fighter. Playing Candlekeep Mysteries, so it isn't that heavy on fighting (we do do add more fights in it than written)
It's been really fun to play and hasn't felt weak at all