We just returned from a weekend in Paris (no Disney this time). We used Abi Transport for our trips to and from the airport for the third time, and they are always great. Abi uses a Mercedes van with room for 7. The van is very comfortable and has Isofix attachments for car seats and wi-fi.
https://en.abi-transport.com/en/blog/taxis-paris-airport-cab-service-abi-transport/
I can also recommend RS Transports (http://www.rstransports.com/). They were absolutely reliable and fast. They picked us up from the airport and brought us to the Disneyland Hotel and didn't want any money from us until they picked us up again on our last day for our transport back to the Airport.
http://www.nrh-transfert-paris.com/
Try this to! They came on time and they are flexible and nice guys!