Universe-scale weapons overwhelm a fictional fleet comparison

Which science-fiction fleet would win if all the settings fought each other?

The answers favor the Xeelee setting or the Culture on the panel's reading of their universe-scale abilities, while acknowledging uneven familiarity with the settings.

The proposed contest puts the fleets of every science-fiction setting into one battle. The answers nominate the Xeelee setting and the Culture because their described capabilities reach beyond ordinary fleet combat to universe-destroying weapons and temporal warfare. A further argument favors the Culture on the claimed ability to survive reality ending around it. Another participant explicitly says they do not know enough about the Culture to judge that comparison. These are the panel's interpretations of incompatible fictional settings, with the scale of the imagined technology deciding the answer before conventional fleet tactics become relevant.