Aaniero - roflstomp. this isn't even a fight.
Szaelapporo - roflstomp, though he may need secunda etapa because szaelapporo will have probably set up some stupid way he can't use his resurrection, like how he did with renjis bankai.
Zommari - zommari is pretty hax, but ulquiorra can easily relocate his skull to by several meters.
Grimjow - From what we have seen of grimjow, this his a med diff. not factoring in whether grimjow has gotten stronger, and by how much. if he even survived.
Noitora - High diff, but only because he just killed the crap out of the last 4 and is probably getting tired by now.
Tier - Med dif.
Barragan - really depends on the mindsets. if both want to kill each other, then they probably will start at resurrection and segunda etapa, so Ulqu can't just throw him like a ragdoll. Barragan seems to be weak(er than from other things) to shockwaves, such as a massive explosion, such as lanza de relampago. High diff to ulquiorra. If Barry starts in base, ulquiorra can probably beat him before he gets his overkill on.
Starrk - Again, depends on whether stark starts in base or ressurecion. if he starts in base, since ulqu will know about lilinette, he can just kill her and cripple starrk. Lilinette is basically fodder compared to other arrancar, so she won't be putting up a fight. Ulquiorra med-diff
If starrk starts in ressurecion, then this is more interesting. i would go with Ulqu, because he seems to be faster. both starrk and ulquiorra where able to outspeed bankai ichigo in base, but R2 ulqu was completely ragdolling him. Also, Starrk was complaining that shunsui was extremely fast, so he probably is slower than R2 ulqu. Ulquiorra V-high diff.
Yammy - R2 ulquiorra is way too fast for yammy to see. Rofl-stomp to ulquiorra.
God i hate my spellchecker. if anything looks stupid, thats probably why.