This alternate version of history infuriates me. Now I know how DA players felt after Traitor was released... And for that reason, I must do my best to completely debunk the idea...
Not sure why we're putting the conditional of not BTs, because that's like asking someone to name a better shooty Horde army than Orks without naming the Imp guard...
Space Marines alone:
Raven Guard...
Night Lords...
Space Wolves...
Ummm Black Templars (because I refuse to play by conditionals)...
Grey Knights (if played Raider Rush)...
Deathwing DA...
ANY Chaos army with Daemon Prince and Chosen squad (and adding the mark of Slaneesh rather than Khorne only makes them better... just sayin)...
And into the NON-Space Marine armies:
Tyranids...
Orks...
3rd Ed armies:
Biel-Tan Swordwind Craftworld...
Dark Eldar Wytchhost...
Claming the CC is the exclusive realm of Khorn is like claming that flamer weapons are the exclusive realm of the Salamanders. What do you mean the Sisters can use flamers? And have flamer tanks? And that practically every other army can be tooled for it?
DC Army rules are not in C:Arm. They only lay out rules for Salamanders, BT, Speed Freeks, and Arm Steel Legion. DC Army rules were, however released in Chapter Approved 2001 following the rules being placed in WD.
+++++Edited for spelling and coding+++++