there is no band that calls itself "christian band" , i think it is stupid to put some bands in a gengre (white metal, christian metal) because of the lyrics ....so is there a satanic metal, or buddha metal, islam metal? or something ...ok ...back to the topic.
bands with "christian" or "white" lyrics not mentioned that KILL:
Saviour Machine: Hm, Dark "progressive" metal in its true meaning, with an amazing voice ..incredible atmosphere.
Veni Domine : from Sweden , a mixture of Candlemass meet Fates Warning and have Queensryche vocals.
Sacred Warrior: us power metal in the vein of early QR, great band .
Joshua: a hard rock band , dont know much bout them.
STRYYYPEEER: ok everyone knows these guys i think, great stuff
Recon: another power metal band from the us ..again in the vein of early QR , yet with some more raw moments.
Believer : who played a sort of "avant garde" death metal.
Haven: us power metal band (again) melodic one, but really great, had many stories from the bible in their lyrics
Bride: these guys had only one good album i.m.o. (Live To Die ) which has a song called "Heroes" where someone may listen to the scream with the bigger length ever!
also MANY bands had their .... "white metal" moments, even Black Sabbath (After Forever ) Solitude Aeturnus (Where Angels Dare To Tread, Opaque Divinity), Manilla Road (may the lords of light be with you blah blah, we will destroy satan's league , and when the gods of hell sentence you to die , remember well my friend the warlord never cries blah blah) and many others.