Toughest Enemies Besides Bosses In The Legend of Zelda: Breath of the Wild
This list doesn't include dungeon bosses, (The many Ganons, the Yiga leader, etc) or the overworld bosses (hinox, stone talus, molduga.)The Top Ten
1 Lynel

2 Guardian Scout IV
3 Silver Lizalfos
4 Wizzrobe
5 Silver Moblin
6 Yiga Blademaster
7 Silver Bokoblin
8 Guardian Stalker

This is hard to fight in breath of the wild since they do so much damage
9 Electric Lizalfos

10 Electric Keese
The Contenders
11 Molduga
I honestly don't know how a lynel is in first when you can evaporate it with an Ancient Arrow. Plus, one hit from a molduga and you are straight up dead regardless of armor..
12 Stalnox
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