Glen's death was horrible, but for me, the absolute worst was Rachel and Susie just because of their ages, the manner in which they died and that they died in the one place that was supposedly safe. That really affected me
I agree. I always thought Rachel and Susie's death were the most brutal (despite occurring off panel), partly because it was so senseless. Most people in this comic are killed for one reason or another, but Thomas had absolutely no reason to decapitate those two little girls. So yea it was the most brutal, and disgusting for sure!
I also think Judith and Lori's death were pretty brutal. Mainly Judith, getting shot then squished like a damn bug. Biggest WTF moment in the Walking Dead.
And the implied brutality (and I believe dismemberment) towards the Hunters was also very gruesome, and has to be some of the most brutal deaths in the series.
More Brutal deaths: Glenn's was pretty nasty! Jessie & Ron. The 3 rapists Abe and Rick ran into on the road was pretty brutal also... And many others! Lol