At least Bennett.I wouldn't waste money on either bennett or landa because i don't see them adding anything to the current team around remco. Lefevere should say to remco, we can sign these two or stick with what you've got now and bump up his wages to €4million + performance bonuses.
At the current moment I think De Plus and possibly Tobias Foss (if he hasn't signed for an other team already) could be the best options. Hirt, Foss, De Plus and De Wilder would be a fairly good support for Remco in the mountains. Add Asgreen and Lampaert and you have a pretty good Tour team.