今まで見た中で

among all I’ve ever seen

→ 今迄
phrase Rare #41,352
among all I’ve ever seen Used with a superlative or ranking to mean “of all the things I have seen so far.”
JA: 今まで見た中で一番おいしい料理です。
EN: It’s the most delicious dish I’ve ever had.

彼女の意見では今まで見た中で彼が最高のミュージシャンです

In her opinion, he is the best musician she has ever seen.

今まで見た中で一番きれい

It's the most beautiful one I've ever seen.

この映画は今まで見た中で一番だ

This is the best movie I've ever seen.

これは私が今まで見た中で最も美しいダチョウです

This is the most beautiful ostrich I have ever seen.