I think Utley should absolutely have his number retired, and I think he has a chance to make the Hall. He was the second best player in the NL for half a decade and while he didn't get the individual awards his play warranted he was better than Howard and Rollins the year they won their MVPs and should have 5 or 6 gold gloves but he played in the wrong time and didn't make enough flashy plays. It shouldn't matter but he also had some key post season moments. The throw out at home in the World Series, the 2009 World Series Home Run Deluge. I'm sure some Mets fans will vote against him but I think he ultimately gets in as his all around play is valued more by more statistically inclined voters in the years to come. He won't get in at first but over the course of his 10 years he'll do enough. I hope I'm able to make the trip to Cooperstown for his induction.
Rollins doesn't make the hall but I'd be happy to see his number retired. He was a near Hall of Fame quality player but there are better players than him who didn't make it. He does have the MVP, and Gold Gloves, as well as being the face of the team during its best period and for the better part of a decade as well as being of All Star Quality for ~5 years, even if he didn't actually make the team most of those years.
I love Howard but I don't think hes on the same level as those two, or Chooch or Cole Hamels. He hit a lot of home runs, won Rookie of the Year, MVP and had high finishes in other years, as well as 3 AS appearances and the Home Run Derby win, but his performances don't hold up to scrutiny knowing what we know now. He finished with 14.7 WAR according to Baseball Reference, and that is the 152nd best total for a First Baseman. Active players with higher WAR than him include Eric Hosmer (17 WAR), José Abreu (21.4), Brandon Belt (21.4), Carlos Santana (31.1). I know WAR isn't perfect and it can change as the formula is adjusted but hes not even close. Theres no argument in his favour that he is a HOF caliber player, even if you take out the defence and his post injury years.
Focusing on just Slugging, his calling card puts him at 29th best of all time at .515, just above Luke Voit and José Abreu.
Cole Hamels is an interesting case. Traditionally you need to get to about 70 WAR as a Starter to reach the Hall threshold and hes at 59.5, 10 more WAR isn't impossible for him, if he can put up another 2 or 3 years of roughly 3 wins after 2020, but I think he falls short of that level. The thing is though, Pitchers pitch less today, so the best of the best are not reaching 70 WAR all that often any more. Among players who are not yet eligible for the hall only Verlander (71.8) and Greinke (71.8) are above 70. Kershaw (68.2) is close but he'll get in no matter what. Halladay got in with 64.2, and CC is only at 62.5 Scherzer and Cole are the same age, and Max (61.0) has a better shot at getting close to 70. I don't know if Cole gets in but theres an argument that at ~60 WAR he may have done enough to get in already. The one thing he has going against him is his peak. His total WAR is 68th best among all starting pitchers but his best 7 season rank 124th with 37.4, but CC isn't that far ahead of him with 39.4. If CC gets in I think Cole has to get in. CC does have the Cy Young but Cole has a WS MVP.
Ultimately I think Cole Hamels and Chase Utley get in, or get really close and then get in on some later vote similar to the one Allen needs to get in. They and Rollins all have their numbers retired. It might seem tough on Chooch and Howard who were key parts of those teams but there has to be a line somewhere, and if you retire Howards number then you have to seriously think about retiring Kruks as well.
The other player who has a really good shout at a retired number is Abreu. He was unfortunate in that he played in the wrong era and wasn't properly valued for what he brought to the team. He put up 45.3 WAR in his 8 full seasons with the team (47.3 including the half season in 2006). He had 7 full seasons better than what Bryce or JT did last year. His 60.2 career WAR is not that far off the Hall. He has higher WAR than players like Ichiro (59.7) Vlad Guerrero HOF (59.5), Bobby Bonds (57.9), Sammy Sosa (58.6) and Chuck Klein HOF (46.0) and its not like he was doing it with his glove so I don' tknow why he didn't get the love he deserved. He was a damn good hitter. Actually the more I look at his stats the less sure am I why he wasn't appreciated. He had a .303/.416/.513 line over 8 and a half years and he played over 150 games every year he was here. Was it just because he was the opposite of Aaron Rowand? He wasn't "gritty" enough, or was it because they didn't win? Based on those stats theres an argument that he has been the Phillies best batter this century. I'm sure I'm forgetting someone, and there are definitely players who have put up better numbers over smaller spells (Thome in 2003 and 04 is the obvious answer) but in terms of pure offensive production is there anyone better? Utley before his injuries is the only one I can think of.