Track conference deadlines Say I have a list of conferences I'm interested in. How can I track the submission deadlines in a single platform?

I'm aware of wikicfp, but there you need to track individual events. If you are interested in conference X, you need to manually add X-2018, X-2019 and so on. In particular, it's really up to the user to have an updated list and thus error-prone.

It would be incredible if the webpage helped me create my list of conferences, providing rankings and filters by field for example. This may be too much to ask though.

In case it's essential for the answer, my fields are Operations Research / Theory of Computer Science.
While it does not send you reminders of upcoming deadlines or anything, I find that this site provides a very nice overview of the deadlines of a number of CS conferences:

http://confsearch.ethz.ch

You can get all conferences from a certain field, for example:
http://confsearch.ethz.ch/confsearch/faces/pages/topic.jsp?topic=Theory&amp;sortMode=1&amp;graphicView=1
gives an overview of theory conferences (I do not see Operations Research mentioned, and I am not sure whether it falls in any of the other categories they have).

It looks like you can also customize the overview to include a specific set of conferences (see their help page for more info).

According to the website, they obtain their info from DBLP and from user input (you can indeed modify information about a conference manually, thereby I am not completely sure how reliable the information on this site is).