I believe there are 4 relatively well-known safeties who will be free agents after this season is over. If I missed a player, I am sure someone here will add him to this list.
In alphabetical order:
Tanard Jackson
Laron Landry
Jim Leonhard
Gibril Wilson
There are lots of factors that go into a decision to sign a free agent to a long-term deal including age, injury history, injury status, "off-field issues", clubhouse leadership, and more.
Nevertheless, a prime factor has to be "on field competence". Translation: Can he play well?
So, is Laron Landry the best safety on that list of four simply in terms of his play on the field? I would suggest he is NOT. My order would be:
1. Leonhard
2. Wilson
3. Landry
4. Jackson
FWIW...