They all sound like healthy weights provided you think they are in good condition right now, piggies come in all shapes and sizes! Mine range from about 800-1400g, it just depends on the individual animal.
With weight the thing to look out for is any dramatic decrease/increase (easier to tell if they've reached full adult size, although improper growth might also be a concern in the earlier stages of life) as it can indicate underlying health issues.
I think they are all in pretty good condition. Pumpkin is a little big, but not overally.
I have made a chart, and am going to weigh them weekly.
I'm guessing Pumpkin is female, I have a female called Lola who is 1200g, she's always been that big, she's not overeating so I'm not concerned. Most of my sows are on the larger side, apart from 3 who are around the 800-850 mark.
A chart is a good idea, it's useful to see any changes week by week.