How to sort a list/stream using an unknown number of comparators?

I have the following snippet:

List<O> os = new ArrayList<>();
os.add(new O("A", 3, "x"));
os.add(new O("A", 2, "y"));
os.add(new O("B", 1, "z"));

Comparator<O> byA = Comparator.comparing(O::getA);
Comparator<O> byB = Comparator.comparing(O::getB);

// I want to use rather this...    
List<Comparator<O>> comparators = new ArrayList<>();
comparators.add(byA);
comparators.add(byB);

os.stream()
    .sorted(byB.thenComparing(byA))
    .forEach(o -> System.out.println(o.getC()));

As you can see, I sort using explicitly two comparators. But what if I have the unknown number of comparators in some list and I want to sort by them all? Is there any way? Or should rather use the old fashion way comparator with multiple ifs?