今まで見た中で

of all the ones I've ever seen

→ 今迄
phrase Rare #44,756
of all the ones I've ever seen Used with a superlative to compare something against everything seen up to now.
JA: 今まで見た中で、この本が一番面白い。
EN: Of all the books I've ever read, this one is the most interesting.

この映画は今まで見た中で一番だ。

This is the best movie I've ever seen.

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.