I was bored an did a bit of research. Since there always seems to be a lot of discussion on the performance of the Ozeki, I've compiled a little table with the help of SumoDB. It lists win-loss records of different rikishi vs. opponents in the joi-jin or higher (minimum 20 bouts).
The dominance of the two Yokozuna is eminently visible. Harumafuji's 38% is the highest winning percentage against Ozeki.
One can really see how Chiyotaikai fell off a cliff -- based on his 2009 performance, he is lower joi-jin material at best. The other ozeki are grouped at the top, with the exception of Baruto, who did a little better than Kaio. Interstingly enough, Harumafuji managed to dominate the other Ozeki, but didn't fare nearly as well against lower ranks. Kotooshu, on the other hand, has troubles against his fellow Ozeki.
Kakuryu did well against the lower ranks, and also managed to hold his own against the Ozeki. Kisenosato, on the other hand, is the only low ranker with a positive record against the Ozeki.
Shikona
vs. Y-M3
Pct.
vs. Y
Pct.
vs. O
Pct.
vs. S-M3
Pct.
Kotooshu
55-27
67%
4-8
33%
8-8
50%
43-11
80%
Harumafuji
57-31
65%
5-8
38%
18-4
82%
34-19
64%
Kotomitsuki
45-36
56%
3-9
25%
8-8
50%
34-19
64%
Baruto
43-36
54%
0-10
0%
13-14
48%
30-12
71%
Kaio
48-41
54%
1-11
8%
10-13
43%
37-17
69%
Kakuryu
35-32
52%
0-9
0%
10-14
42%
25-9
74%
Kisenosato
36-40
47%
1-9
10%
13-12
52%
22-19
54%
Kotoshogiku
31-36
46%
0-10
0%
5-9
36%
26-17
60%
Goeido
31-38
45%
0-8
0%
12-13
48%
19-17
53%
Kyokutenho
30-41
42%
0-10
0%
6-18
25%
24-13
65%
Aminishiki
23-37
38%
1-7
13%
8-9
47%
14-21
40%
Chiyotaikai
30-52
37%
1-10
9%
4-15
21%
25-27
48%
Tokitenku
8-15
35%
0-2
0%
3-5
38%
5-8
38%
Toyonoshima
9-17
35%
0-2
0%
2-8
20%
7-7
50%
Takekaze
16-32
33%
0-6
0%
5-11
31%
11-15
42%
Aran
7-14
33%
0-2
0%
1-4
20%
6-8
43%
Tochiozan
18-38
32%
0-8
0%
7-13
35%
11-17
39%
Tamanoshima
7-20
26%
0-4
0%
2-8
20%
5-8
38%
Miyabiyama
10-33
23%
0-6
0%
6-10
38%
4-17
19%
Hokutoriki
4-17
19%
0-2
0%
0-7
0%
4-8
33%