From the Australian 'down under' here are some I can remember
Allan (& Fay) Mason
Rex Manwearing - I remember him going on about how some brothers were so materialistic they had 'wall to wall' carpet and used more than one type of wine glass at dinner. Very rude man.
Bill Whitehead (CO then DO) - very flippant about sickness and death in his talks - the first time I heard the term 'get into the new system via the underground' used
Don Wilson - used to be a baker in Mackay before going on the circuit. I found both him and his wife to be rude people
Bob (& Diedre) Blackstock - stayed with us many times and we actually had some really good fun with them
Bruce Fenson - very decent bloke
Vin (& Sue) Toole - stayed with us many times before they went to Bethel
Michael (& Roslyn) Dawson - arrogant and Roslyn had all these supposed allergies
Ben & Sally Groth - knew them both when they were young publishers before they married and went on the circuit
Claude (& Helen) Munro - knew them before and after they went on the circuit. Claude died of cancer in 1994.
Geoff Schlark (not sure of spelling)
Gary Spalding (DO) - stayed with us - nice fellow
There was another one (I can't remember his name right now) - his wife Dorothy got sick while they were on the district. After she died he remarried (less than a year later) a much younger girl named Sue and they went on the circuit. I remember not long before they came to our congregation the young married couples had been given a talking to about what kind of touching was appropriate in the hall - eg discreetly holding hands and if the husband puts his hands on his wife's back he is not to move it about. Anyway they come along for the circuit visit and during every meeting he had his hands all over his wife, rubbing her back etc. Caused a bit of a stir amongst us young couples!
And the ones who have been mentioned:
Ray Cowling (aka Raymond M. Cowling - this was how he labelled his things) - we nicknamed him Raymond Manifest Cowling as he seemed to use the word manifest so many times in his talks. Was also the one who I think started the saying "If it's human and it moves, witness to it".
Hans Hubler - enough has been said about this unlikeable man
Someone mentioned Winston Payne - I remember him and his wife used to live in the tiny room/flat under the Kingdom Hall in Red Hill (Qld). What a creepy place that hall was!