MAX value of columns(Conditional Formatting)

I think the gist of the request is to have this apply dynamically and broadly, based on whatever column this measure is placed "under."  I.e., someting more like:

FormatAll =

var _Darkgreen = " #34A853"

var _A = DISTINCTCOUNT('TableA'[ID])

var _B = DISTINCTCOUNT('TableB'[ID])

var _C = DISTINCTCOUNT('TableC'[ID])

var _list= FILTER({var _A, var _B, var _C},[Value]<>BLANK())

var _max = MAXX(_list,VALUE([Value]))

// pseudo-code example:
var _column = getColumnName(Table)

Return IF(Table[_column] = _max, _Darkgreen)