Riser recliner chair recommendations

[Twozealotmorethan1]

I'm looking for recommendations for a riser recliner chair for my Dad who is currently severely immobilised with osteo-arthritis and awaiting knee replacement surgery. It needs to be a fabric covered type, not leather or fake leather. He's a reasonably big guy at around 6ft and 16stones.
Any tips on how to choose, what type to buy and where from please?
And specifically, is a dual motor necessary or will a single do?
Thanks