65" near the end of the 26.5" storm of March 14-15, 1984 is tops - measured 80" on Big Twenty Twp. We'd reached 61" the morning after the 18.5" surprise* in early Feb but was settled to 59" at obs time. Then the 2nd half of Feb ran 15-20 AN and the pack dropped to 35". Without that thaw, just imagine.
*The forecast had been 1-3, so the parking lot plowers weren't alerted until it was too late - Fort Kent's only full day lost to snow in our 10 years there. They lost a half day to the March event - 6" that morning with 6+ expected, by noon another 8 had fallen and it was coming 3"/hr so they sent the kids home, and everyone made it without serious issue, some living 30 miles and many hills from the high school.
2nd place is 54" in March 1977 - that winter's 186.5" in the most I've measured. Next are the 49 (09) and 48 (01 and 08) where I now live. Have topped 40 in 6 of 22 winters here.