Saying that Drogba wasn't a particularly technical player wuld be doing a great disservice to his talent level. Sure, he wasn't Henry or Shevchenko, but he was substantially better than Benteke at a similar age for both Guingamp and Marseille. Plus, as
@Raven pointed out, he was a late developer so there was a steeper developmental curve involved in terms of his ultimate projection once he realized his raw ability. He set up the attackers around him pretty effectively. What made Drogba special wasn't something as simple as giving him and chance and making the opposition pay. What made him special was his fierce competitiveness, relentless defensive work-rate, the ability to ghost his marker, to rise to the occasion in bigger matches, and the natural gravitas he exuded for his club and Ivory Coast. That's almost worlds apart from Benteke's level. Just because they share a couple of traits doesn't mean they are similar players. People insulate themselves in these kind of narratives, and it's a pity because it almost never works out.
As to the question : We need a striker who combines both abilities, someone who can score 20-25 goals per season, and bring his team-mates into the game as the focal point of the attack. And there's no guarantee Memphis will score 20-30 goals in the Premier League. That's a quantum leap from the Eredivisie, so to expect that kind of return in the near future is a bit unfair. Someone like Eden Hazard scored 20 goals in the Ligue 1 in his last season for Lille, and his highest tally is 14 goals, with added experience too. Similar to Memphis' 22 in the league. Or Dusan Tadic who scored 16 for Twente, and now 4 for Southampton. Memphis would do well to break into double-digit marks, instead of 20-30, so we do kind of need a proven goalscorer to ease his burden but someone who also complements Memphis' instincts in front goal. Expecting Memphis to share significant goalscoring duties could derail him. Young players should be developed with extreme caution, with gradual increment in expectations.
Don't agree with the assessment of Lewandowski either, or the fact that we was bracketed with Cavani or Benteke. Apart from Benzema, Robert is probably the best suited striker for our tactics going forward. He can score a bunch, and bring his attacking peers into the equation because of his excellent hold-up ability and link-up play, evidenced by the success and goal-return of Gotze and Reus at Dortmund alongside him.
Might not be the most popular opinion per se, but hope this is true, or Benteke stays as Aston Villa. Don't rate him a lot in terms of what we need not just for the present, but for the future. Probably a Clyne type deal with United's name being used as a catalyst for the transfer.