Happy: SUN..... Obvious, innit? Herr/Hair Leader-elect himself I guess.
Sleepy: MOON... What do we (mostly) do when the Moon's out? Ben Carson, chosen for Secretary of Housing and Urban Development usually looks sleepy.
Doc: MERCURY...The geeky one with specs. Steve Mnuchin, soon to be Secretary of the Treasury looks the part.
Bashful: VENUS.....Love...when in love many feel bashful. Dunno - maybe reserve this one for Trump's Secretary of State pick - he seems to be bashful about naming one.
Sneezy: MARS..... Explosive eruptions from the nasal region. Rep. Tom Price, Secretary of Health and Human Services - seems appropriate!
Dopey: JUPITER...Purple hat & BIG ears give him away. Sen. Jeff Sessions, Attorney General - I doubt he's THAT dopey, but he does have ears!
Grumpy: SATURN... Obvious, innit? Retired Gen. James Mattis, Secretary of Defense
While considering sevens, and Donald Trump's picks for his cabinet and committees, that other famous seven springs to mind. I can't relate these individually but all seven, bundled, in a mixture of strengths wouldn't be far off communally, with the possible exception of sloth, because they'll all be too busy utilising the other six.
Envy = the desire to have an item or experience that someone else possesses
Gluttony = excessive ongoing consumption of food or drink
Greed or Avarice = an excessive pursuit of material possessions
Lust = an uncontrollable passion or longing, especially for sexual desires
Pride = excessive view of one's self without regard to others.
Sloth = excessive laziness or the failure to act and utilize one’s talents
Wrath = uncontrollable feelings of anger and hate towards another person.
Venturing further into the dark side of sevens:
WikipediaThe Seven bowls are a set of plagues mentioned in Revelation 16. They are recorded as apocalyptic events that were seen in the vision of the Revelation of Jesus Christ, by John of Patmos. Seven angels are thus given seven bowls of God's wrath, each consisting of judgements full of the wrath of God. These seven bowls of God's wrath are poured out on the wicked and the followers of the Antichrist after the sounding of the seven trumpets.
Hmmm...erm, excuse me....