It's always difficult comparing riders from different eras due to variables and bias but I think I'd lean towards the riders from 2007 in those particular match ups and as a whole the 2007 side (despite how dominate the 2019 team was) wins hands down for me largely down to the 2 reserves and relative strength of opposition sides.
TC 6.12 v AE 6.49 (final season averages). Both spent the majority of the season riding in the #2 position and finished with similar averages, whilst I have no doubt Ellis will go on to be the better rider and he would be my pick purely on his youth and potential, there really was little between them in their contributions for the seasons in question.
CG 7.13 v RJ 7.86. Another difficult choice, both exciting to watch and strong middle order riders, Gjedde had a month at reserve mid season and i think probably rode in every position bar #1 at some stage but he'd be my pick simply based on his extra experience and the fact he'd been an established top flight rider for a number of seasons over RJ who has only had half a season at this stage.
SU 7.11 v TM 6.21. Controversial here I'm sure, Tobi is a crowd favourite, hugely entertaining to watch and we all love him, I'd certainly want him in my team every season on such an average, but if it came to a straight choice between the 2 at this particular stage of their careers it'd be Seba for me all day long, he represented his country the previous year (no mean feat), filled the #3 position when your 2nd best rider had too (his main adversaries that year would have been Kasprzak, Pedersen B, Screen, Schlein/Harris, Bjerre/NKI, Zagar, Louis, Norris, Hamill and Pepe) and upped his average to 9.31 early on after a blistering start to the campaign before tailing off slightly after a falling out with riding partner Gjedde and a wrist injury sustained at Ipswich in the mid summer.