Of the names coming up one person has four 10s and another has 5.
Spielberg has four, but he also has a 1 among other low scores.
There are 199 Ratings of 10, with twenty-seven of them in the Top 10, and 19 Ratings of 9.5.
The lowest ranked directors with a Rating of 10 are Doug Liman (#352), Curtis Hanson (#378), Mel Gibson (#549) and The Duplass Brothers (#624). All were given a 10 by smirnoff under the system I mentioned above. Excluding smiroff you will find a 10 Rating to James Cameron (#297) and for that you can thank Me. (And all you 3s, 4s and 5s can go suck an egg.)
On the flip side, the highest ranked director with a 0 Rating is Jean-Luc Godard (#266). Spielberg and Tarantino are the only names in the Top 100 with a 1 Rating. After them is Darren Aronofsky (#131)