The best solution would be to shoot in live view, but that's not always ideal and will really kill your battery life. If you love using the viewfinder (I sure love using one, optical or electronic), using a different focusing screen can remedy some exposure errors while having the added benefit of potentially improving the manual focus experience. Those admittedly bulky LCD screen viewer/loupe thingies come in handy for live view or for mirrorless cameras that lack EVFs.
The EF-S focusing screen or a cut-to-size EC-A helped some 40/50/60D folks with exposure issues with adapted lenses in old DPR threads. For smaller apertures the EF-S screen is apparently much dimmer than the stock one, so keep that in mind as a potential downside for viewfinder usability.
If you only got overexposure errors while stopping down (which, according to the sample you provided, is not the case as you shot wide open), you could opt to shoot in manual mode, meter wide open, and do mental math on the fly to set the correct exposure at your desired aperture... which is also less than ideal.
