I like how entry #6 and entry #7 have graphical elements for the 4 business lines. #6 is a bit cleaner - the script in #7 is a bit distracting.
For entry #6, could we see some color variations, even if it moves outside the defined color palette (so long as it ties in or has the same feel) for each of the characters? We could then use the colors as base colors for the business lines in our materials.