Other ways of saying “except for one”

Question

For example in the sentence

All datapoints, except for one, lie on a line.

to me (not a native English speaker), the "except for one" part sounds too heavy. Are there other, lighter ways of saying this?

Is the following correct?

All datapoints, less one, lie on a line.

Answer 1

You can say

All datapoints but one lie on a line.

Answer 2

All bar one or all save one are possible, but Bill's all but one (which could also be expressed as All but one datapoint lie on a line) is most natural.

Answer 3

You could also just drop the 'for'. All data points, except one, lie on a line.