I decided to make a list of the students that I won't consider Izuku copying their quirks, for ome reason or another.

Class 1-A:

Mineta.

Illda.

Bakugou (Already has his).

Ochako.

Momo.

Jirou.

Tooru.

Shoji.

Sato.

Koda.

Tsuyu (can't copy any mutant quirks).

Ojiro.

Sero.

And Aoyama.

Class 1-B:

Kamakiri.

Shiozaki.

Komori.

Pony.

Shoda.

Shishida.

Manga.

Tokage.

Bondo.

And Rin (Has a similar quirk already).

None of these students will be considered for copying