I could see really well because there was no one in front of me.
こんにちは。
さまざまな言い方ができると思いますが、下記のような英語表現はいかがでしょうか：
I could see really well because there was no one in front of me.
前に誰もいなかったのでとてもよく見えました。
see really well - とてもよく見える
ぜひ参考にしてください。
There was no one in the seat in front of me, so I could see well and was comfortable.
"前のシートの人がいなくて、よく見え快適だった"
- There was no one in the seat in front of me, so I could see well and was comfortable.
ミュージカルに行きましたが、私の前の席の人が来なくて、空いていて、舞台がとてもよく見えて快適でした。
- I went to a musical but the person who was supposed to sit in front of me did not come, so the seat was empty and I could see the stage very well.
アメリカ合衆国 
