There are a number of sites about the roles of servants, and if reasonably detailed, mention height, good legs and the livery the footmen wore.The better presented and matched they were, the higher the household status - hence the caricatured images of women fluttering their eyelashes at the footmen assisting them in some way, and, that's possibly why the young footmen portrayed in shows such as 'Downtown Abbey' are always shown as good looking.
As far as 'male' servants go, I was looking for an 'inside' servant. Valets certainly were but they had a crucial role for the master and usually travelled with them everywhere. I'm not sure they would be able to marry [twice], be able to support a family at the same time and acquire property. 'Outside' servants had even less status than the 'inner' ones. Steward is a high status role; he usually would be called that and not often be represented as 'servant', particularly by the person themselves, as has happened here.
Threlfallyorky, I think it's very likely Thomas was doing what he could to improve his circumstances and his Will certainly suggests enough to call himself a gentleman [although his actions may suggest something else].
Thanks to all respondents.
N