I completed the game without any deaths until Hero Mode. I just beat Levias and I've only gotten one death, which was from the rolling boulder at the end of the Earth Temple (I didn't even die there the first time through! D: ). Unless of course you count my intention suicide to see what happens when The Imprisoned gets to the Sealed Temple.
I've had loads of close calls though, even on my first run. Off the top of my head...
-Fighting basic enemies my first time in Faron Woods
-Staldras in the Skyview Temple
-Ghirahim
-Bomb Flowers and Pyrups in Eldin Volcano
-Quadro Babas with the Timeshift Stones activated in Lanayru Mine
-Demise
On Hero Mode my closest moment was the fight against Stalmaster, but I've had several others, I just can't remember them right now.
I've had loads of close calls though, even on my first run. Off the top of my head...
-Fighting basic enemies my first time in Faron Woods
-Staldras in the Skyview Temple
-Ghirahim
-Bomb Flowers and Pyrups in Eldin Volcano
-Quadro Babas with the Timeshift Stones activated in Lanayru Mine
-Demise
On Hero Mode my closest moment was the fight against Stalmaster, but I've had several others, I just can't remember them right now.