WordNet sense 1 (without any attempt at concealment; completely obvious):

blatant, blazing

WordNet sense 2 (not concealed or hidden):

unconcealed

WordNet sense 3 (having a quality that thrusts itself into attention):

outstanding, prominent, salient, striking

WordNet sense 4 (singled out for notice or especially for a dire fate):

marked

WordNet sense 5 (conspicuously and outrageously bad or reprehensible):

flagrant, glaring, rank