Is there a split with 34 keys as the Sweep but stagger like the Corne?

It all depends on what sort of mashup you want exactly. Keep in mind that some of the official cornes have a break-off 6th column so you can get close to the same key count as a Sweep (36 instead of 34). Here are some that might come close.

• https://github.com/jimmerricks/chocolad
• https://github.com/makenova/micro_redox/tree/main/micro_redox_split
• https://github.com/davidphilipbarr/36keys/blob/master/34Keys/Cradio/34.png