I've had (and still have) older US-made Craftsman grinders in 6,7, and 8" sizes and all are still going strong decades later. The smaller ones are fitted with drill pointers, special sharpening platforms, etc. These are readily available in decent shape used. The cast iron guards are fine, the motor and bearings are good. The only thing not to like is the tool rests.
Also a 10" Baldor which is fine in every respect. But, frankly, a belt sander/grinder beats a large wheel grinder for most uses in my opinion.
I had a made-in-Taiwan Jet which was decent, but surplus to my needs. The only grinder I've hated and quickly gotten rid of was a 7" Chinese made Wilton (and apparently the same as the Chinese-Made Craftsman). The "soft start" capacitor failed, the grinder was gutless, the guards flimsly, the tool rest junk, the motor poorly balanced, and the wheel retaining washers junk.
Also have a Kalimar 5" reciprocating diamond sharpener and one of those cheap Chinese Baldor tool grinder clones as above. Both have worked fine. Not sure why the Chinese-made tool grinder motor has decent power and balance -- maybe because it's not asked to do much -- but it's been a decent bargain.