You're right, the recent papers I've seen contradicting the former recommendation to avoid beta-blockers (
eg) are almost exclusively regarding cocaine and/or amphetamines, which would be the biggest culprits in any emergency setting.
However, I can't see logically how the class should have much relevance since the beta-blocker isn't altering the pharmacodynamics of any drug directly. Rather, it's impeding its ability to interact with beta receptors, and it is this blocking that caused the former theorised concern (as blocking beta can stimulate alpha).
Receptor affinities may differ vis-a-vis a different drug or class to varying degrees, but the subsequent alpha-adrenergic response isn't going to suddenly or randomly become disproportionately excessive in response. If in doubt, start out with a very low dose and gradually titrate up.
With ritalin, I have used beta-blockers before (specifically propranolol, nebivolol, labetalol, bisoprolol), though admittedly not for the comedown, instead just to take the edge off the peripheral stimulation, which they all did quite nicely - particularly the nebivolol, surprisingly.