From personal experience BA, Cathay, Virgin, KLM, Lufthansa, Britania, Air 2000, Airtours are all safe with KLM offering the best service. BA's service varies from great to awful all depending on the Cabin Cheif. Virgins service has always been great outbound from UK and dreadful inbound so I suspect crew are all feeling second-hand.
The worst airline I have flown with is Aeropostale who regularly operate Air France flights, suitcases and baggage stuffed between the seats, pax left with their seatbelts hanging into the aisle and whats more the staff don't correct anything when its pointed out.