Some aggressive razors, from what I have tried:
R41 2011 and 2013
Fatip open comb
Sabi T2 and T1 closed comb heads
Parker closed comb heads
Merkur 37 Slant
Maggard Slant
Razorock German 37 Slant
ATT H1 (H2 too I suppose)
Merkur Futur (the blade gap can be huge)
Merkur Progress (at higher settings)
Medium aggressive:
Fatip Gentile
ATT S1 and S2 (more so)
Aggressive from what I have heard, but haven't tried:
iKon Tech
Parker Variant
Straight razors. Not DEs I know but if you are looking for more aggression maybe you should be looking at another platform.
Not the smoothest head for me, so I can't really comment. It would be great if you could try before you buyIm thinking ATT H1
a Devette can be pretty aggressive I guess...
Use more pressure with your shaves, that'll cut your hair down to the skin and beyond
YMMV, what one person will consider mild another will find aggressive and the other way around, it's so subjective. Do you want some thing the shave you really efficantly or do you want something that will bite you and make you bleed ?