A few observations.
Note I am Not a Beatles fan. I am to you to have seen them and I own one alblum and a few individual songs.
That being said
You dont get an invasion with out the Beetles . You get at best a Raid, because no other group could sustain itself like the Beatles did. And you need that to creat the backbone of the Invasion.
Yes you may see the DC5 in the US (not sure if they are Butterfliex or not). But the DC5 don’t have the appeal of the Bettels. The Beachboys don’t have that appeal. Heck short of Elvis it is hard to find that appeal.
Song writing is the ABSOLUTE most import thing. I can find find millions of good singers or interment players and I can find great personalities but you need the song. A good song will carry a bad singer. But a great singer can’t carry a bad song. And the. Beatles have some of the best songs ever. Heck some of those songs actually sound better as instrumentals.
Yes there are over the top Beatles fans but we seam to have an over the top DC5 fan here as well.
No matter how you look at it the DC5 is not the Beatles. As much as it pains me to say the Beatles were overall the best to exist. And PM was perhaps one of the 4 or so best song writers to ever live. You. Don’t just snap your fingers and replace them. It was not a fluke that they did what they did.
Will you see British groups in the US? Of course including the DC5 (most likely pending butterflies). But with out Beatlemania you don’t have people making such a big deal over the British groups. The same way that you has Sci Fi and Sci Fi movies before Star Wars but because of Star Wars every movie company on the planet wanted a space Sci Fi. Heck even James Bond went to space.
So I am sure the without the Fab 4 more then a few British groups don’t get the attention, the TV coverage or the record deals they got in the OTL.
Note I am not saying you don’t see a fair number of British groups , the scene in Britain was very hot at the time with loads of talent but it is just not the culture phenomenon it was OTL.
I just went and listened to a bunch of DC5 songs and realized i know about 4 or 5 of them. And liked them. But sorry compared to the Beatles the songs are at best fair to average. Many one hit wonders of the time had better songs and some groups like the Beachboys and the Beatles had better songs. Not saying the DC5 singers were bad I would rate them as solid 7-8. But the average BB and Beatles songs were 7-8 with many 9 and a few 10s. And a lot of one hit wonders hit 8-9-10 range. So they are not going to catch fire like the Beatles did, as you up yourself noted even the Beachboys a group general viewed as a major success of the time didn’t come close to the mania of the Beatles.
Now the question is, after posting the topic as a question can you accept the answers?
First of all, I'm not a over the top Dave Clark 5 fan. I like them but they are not my favorites. This isn't about their amazing songwriting or their amazing talent, like I mentioned before, this is about business. The Beatles were obviously talented but their early massive success was more than just talent. I could still see a successful British Invasion in America without The Beatles. Some bands would had been affected like I mentioned earlier. No Monkees and The Rolling Stones songwriting gets delayed so no successful 1965 Rolling Stones. The Beatles were part of their time. There were many British bands having similar influences. One of them would had broken through eventually.
I mentioned earlier that The Dave Clark 5 would had done first wave Beatles but not second wave Beatles. They would had been passe by 1967. Since there were many British groups, you could replace them and try to figure out what their replacement can do which was about to be different. The Beatles were great but popular music would had evolved with or without them. I'm not discrediting them but things had to moved on.
I feel like if they never broke up, they wouldn't had been this critical acclaimed. Their break up in 1970 seal their myth for a long time to come.