Honestly, I don't think you'd have any concerns with finding some that are suitable, those are the sizes of monitor that the overwhelming majority of the stands are made for. Monitors get absurdly large now.

What sizes are your monitors? Personally I think gas springs are the best, as any good one will allow you to adjust height and position with relative ease. Biggest thing you really have to watch for is the weight of your monitor vs the capacity of the stand, but if you're not dealing with huge monitors you likely won't run into this.