Biritish girlgroup the Sugababes from the 2000s were replaced one by one. And in a Thomas Hobbes Ship of Theseus expansion pack twist, the original three members got back together again.

Tangential, but I this made me realize I honestly don't know the member names of most of the bands I listen to. I kinda know their faces if they have videos.

Blood Sweat & Tears had like 200 members, my dad knew one of the founding members and went to one of their concerts a couple years back. Got to talk to them after the show and not one of them had even heard of the guy. Feels like the ultimate example of this

I'd bet a bunch of vocal groups from the early days of vinyl would fall into this group. They're probably mostly in Las Vegas and Branson these days.

As a personal memory, I played a few gigs with The Diamonds(most known for their hit 1957 record "Little Darlin'") back in the early 2000s. They were having a bit of a resurgence after a PBS series aired. At one point the original bass singer was back, but he wasn't long for this earth and somebody else was in his place by the second tour I did.

Tull comes close. Anderson at one point said the band was over without barre but he reformed the band this millenia without him so at this point he is the only one who has always been with the band and indeed many people think his name is jethro tull. The band has had a crazy amount of turnover even early in its career and a crazy amount of ex members in other well known bands. Heck in the first or second studio album there is a song about members that left the band before its success. The 20 year album had a little flow chart of band members who ended up in other groups.

Whats the one where they are blue, wasn't the point so that members can change with little notice?

There is a local band called "Bläck Fööss" who were founded in 1970. They made the complete rebuild about one and a half times, and are still successful.

I don't think Chicago has anyone original left...?

A lot of k-pop boy/girl bands have rotating members that can age out and be replaced.

The Wiggles only have Anthony as an original member.

Does Skid Row count? The original band saw people come and go all the time, to the point that nobody really knew who was a member at that point. In 1987, Gary Moore, who hadn't been a member anymore, actually "sold" the name to a US band. The last original member still disputes the sale. So, you have two bands with the same name, with the original band had members replaced multiple times, with even the last remaining original member leaving and rejoining twice.

Napalm Death though the current line-up has been the same since their third album with sad exemption of Jesse Pintado who passed away in 2006.

I think "The Skatalites" qualify, simply out of the age of the band.

I like to joke that Equilibrium had more member changes than the contestant field of a casting show.

Hawkwind has been going so long it's basically an institution. Fuck knows how Dave Brock is still going

Going off first recordings/releases, Scottish hardcore punks 'The Exploited' only remaining member is Wattie (singer). Going by initial formation and first live shows, none of the 'first' members remain.

Yes

Spooky Tooth’s 1970 album “The Last Puff” has no performers in common with their 1974 album “The Mirror”.

The band Foreigner’s only constant member is Mick Jones (incidentally also from Spooky Tooth), but he was absent from some modern tours.

I think Yes also had a period in which there were no commonalities with the original lineup.

Surely The Wiggles have done it by now.

napalm death had this happen on their debut album. first side is one group of guys, second side is a completely different group, except the drummer

I wanna say Lorna Shore? It's been a hot minute, but I'm pretty sure all of the original members of the band have left.

Well, not completely Theseus'd, but Andrew Stockdale is the only continuous member of Wolfmother!

Little River Band

It's a tragedy really

Dr Feelgood was a band where this happened

Journey?

Any originals left in that band?

Journey apparently only has one original member left. I mention them because I remember them having a lot of turnover.

Sugar Babes, but somehow they are back to the original trio :)

Asking Alexandria, now that Ben Bruce has finally pulled the pin.