I buy new macbook pro and as you know they have only USB type C. I also do not want to have any adapters.
So, I try to find some LTE/4G mobile modem or USB stick with this USB type.
Are there any good solutions in the market?
I use one of these personally and several of them for my small business. There are regional variants - ATTWS, Telstra, others - with different bands. I use mine on both ATTWS in the US and Rogers in Canada. They connect via wifi, Ethernet, or over USB - the charging/data cable is a USB-C cable. I connect it to a rMBP that I travel with or my iMP at my home office via USB-C or via Ethernet/link aggregation with my wireless router (Synology RT2600AC).
When I'm on the road I use wifi or USB, generally with the battery removed - the MR 1100 works with or without the battery.
I purchased them from an ATTWS corporate store, they're unlocked. I've used both an ATTWS SIM (provisioned for my wireless plan) and a VZW SIM in mine, works perfectly.