Well, that's not aggro gen, that's aggro management, isn't it? You want to generate more in 10s than others do in 5 minutes? You say you don't want threat tools, just gen, but this kind of threat gen would let a tank build threat for half a minute and then go afk.
If you want to recover from a death , we need threat tools, not just generation. I don't see a way around it.