"Signs"?
Signs are a pet-peeve of mine. I consider them, as used, to be irrelevant. The Tropical Zodiac was "invented" in/around 212 AD by the Greeks. This followed the complete, workable zodiac that had been in use for about a thousand years before that, a zodiac established and developed by observation compared with careful correlation. Today, we call that the Sidereal Zodiac, back then it was just the zodiac. Apparently the Greeks misunderstood the math and tables of information they borrowed from the Babylonians, Assyrians and others related or descended from them. The zodiac, at that time of upheaval, was based upon the equinox and the seasonal calendar and not the constellation-basis of reference used for hundreds of years earlier.
Now, many studies have been done concerning the tropical zodiac. The most extensive and life-long study was done by Michael Gauquin (?) of France in the middle and latter 1900's. He found extensive correlations between angular planets and their influence professionally in hundreds of thousands of charts. The only big thing was that sign-influence was all wrong and very inconsistent. When his life long study was recalculated using the Sidereal zodiac, every thing fit amazingly well. Those statistics will be published in the next couple of years and may well turn Tropical astrology on its head.
In any case, tropical or sidereal, signs are "modifiers" at best. The planets and the cycles and aspects are what works. I disagree strongly with your statement that death starts when you are born. The process of dying starts when something changes that is outside the bounds of natural body functions in terms of normal healthy living. Viruses, bacteria, infection, accidents, the aging process, one body system getting out of whack and affecting others (plaque build up in the arteries due to diet, for example) -- these might all start the dying process. Even dispair, depressions, or one's attitude can bring on the road to death.
The day you die does tell about what you are experiencing in certain types of charts. As I noted, it often requires various ways of looking at charts to do prediction. In some cases, just the natal chart and transits will tell of a certain view of death. In other cases, cyclic charts are most appropriate. There is a cycle that commences at birth and move through ones whole life. This cycle is typically not known to early-studies-students and is dependent upon more than a casual awareness of astrology. Sometimes this cycle and relevant charts work better in predicting death. But, this discussion is beyond many who follow this forum and would require a lot of explanation and time.
To summarize, I have never seen "death" signatures being related to a certain sun-sign. Death can be predictable but never certain and definitely hard to identify before hand in most cases -- easier to see after the fact. Death can "start" or "occur" at any point. Until then, we live. Death and resurrection in terms of what SMV noted would be an interesting study.
SMV, do you have any data for people who have had this type of experience?
Dave