#5 -- too human. If this were more tiger and less human, it would be stronger.
#6 -- not sure I understand the shape, but it has a nice balance, and a good level of detail.
#7 -- similar, not sure I understand the shape, looks more like a bird than a tiger.
Overall, good concepts. Needs more tiger tho. Also, feel free to leave out the text and focus just on the pictorial mark.
Please note the two page PDF file I attached to the contest brief, it has a lot of background material about the Tuan character and the idea of tiger magic that I want captured in the logo.