While browsing the forum the past week I saw people complaining about how long it has been since their bias group had their last comeback, which made me think:
which groups of the Big 4 and other wellknown groups are having the longest inactivity gap since their last comeback?
For a moment I considered all the still existing groups - but I fear that list would be several pages long with hiatuses in the 4-5+ years and that it would read more like a sad, depressing eulogy of entire ranks of groups barely hanging on by a thread 
So when it's only about the wellknown groups, which are currently suffering the longest hiatuses - or what could be considered overtly long considering the status, popularity and position of a group?
