Thanks for replying. Well, I did review the other charts provided by Google and none of them offer what I am looking for.
Simply, I need something similar to the annotated timeline, except it is vertical. It could be an option added to the current annotated timeline API so that the time is on the Y axis rather than the X axis. I understand that most designs will put the time on the X axis, but I believe for our project (and I am sure many others) having the timeline on the Y axis is the way to go. One important advantage of the time being on the Y axis is usability because you will naturally scroll up and down the time line rather than going horizontally. This is the natural human scrolling movement (pages normally scroll up and down ...etc.) . So usability suggests vertical timeline, especially for our project.
Here is an example of a vertical timeline (this is however not what we exactly wanna do, but it is out there)
Anyway, I really hope that there is a future plan to add a vertical display option to the current annotated timeline api.
Thanks.