Except the afore mentioned Kendas I don't think there were many 27" tires made wider than x 1 1/4. I could be wrong but I think 27" wheels were a US market thing and always intended to be for "light weight" bikes so fat tires were never a big deal. I do recall seeing some sort of knobby 27" tires back in '90ish but they were really cheap.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk