Ther's no such thing as the greatest team ever, its subjective and a matter of opinion.
There have been many great teams over the years - Lotus definitely,
Williams (active suspension)- .
Tyrell (6 wheeler one of their innovations)
Brabham (undercar extractor fan to increase downforce)
Hesketh (achieved amazing results in the 70s with a minuscule budget - also had female driver for a while Davina Gallica),
BRM (amazing engine developments) and so on and so on.
For me a great team is one that can produce innovation - that is what F1 is about, it is what sets F1 apart from all other motor racing formats. A team can be great but win very little, if it is driven by passion. The likes of today's Ferrari & McLaren are driven by money more than anything else. Sure they win a lot, but they damned well should do, but many teams achieve so much more per £ - Williams is a good example today.
Lets forget about the best team ever. There are very few of us able to remember and understand the contribution made by the early teams - Alfa, Jaguar, Matra etc. Lets just enjoy F1 for what it is whilst understanding that so many teams and individuals have brought F1 to where it is today.
I'll give you Lotus for all the very relevant technological innovations introduced by them ( and because Colin Chapman is one of my heroes).
Williams has indeed been a great team throughout its history.
The Tyrell 6 wheeler was a technological dead end and unsuccessful to boot.
The Brabham fan car (the BT46 I think) won its one and only race at the hand of Niki Lauda but it was also a dangerous technological dead end and rightfully banned.
The BRM H16 was a horrible, troublesome, overly complicated, and vastly overweight engine. It was junk and hastened the end of BRM.
My point is that greatness in motorsport is not about technology but is about success over the long term.
I believe that winning is the final, overarching goal of any team as it should be IMO.