Spencer for me too.
I have a great deal of nostalglc affection for M.A.C.H. Zero, it was something I read in the first tranche of backprogs I ever scored, long before I ever set eyes on M.A.C.H. 1 and its harried grotesque and obviously doomed protagonist seemed like an excitingly different Frankensteiny prospect to clean-cut government heroes. But The Hit and B.L.A.I.R. 1 undid all that goodwill. Great editor, really loved his TMO book, but as a 2000AD writer, not a lot to love...
Spencer on the other hand delivered some personal-nostalgic oddities in Plagues of Necropolis and Masque of the Judge, Death as well as the wonderfully creepy Creep. Never a fan of Harke & Burr, but I think the former are strong, and unique, enough to edge out McManus.