Smith conducted a poll 650 people with a 3.9% margin of error that was published by the Jerusalem Post on March 22 2019.
Current Knesset seats in [brackets]
30 [11] Blue & White (Gantz, Lapid, Yaalon & Ashkenazi)
27 [29] Likud (Netanyahu)
08 [18] Labor (Gabbai)
08 [05] Hadash-Taal (Odeh & Tibi)
07 [06] United Torah Judaism (Litzman)
06 [07] Shas (Deri)
06 [05] United Right List (Peretz, Smotrich & Ben Gvir)
06 [03] Hayamin Hehadash (Bennett & Shaked)
05 [10] Kulanu (Kahlon)
05 [05] Meretz (Zandberg)
04 [08] Raam-Balad (Abbas)
04 [05] Yisrael Beitenu (Liberman)
04 [–-] Zehut (Feiglin)
Under 3.25% electoral threshold:
2.8% [01] Gesher (Orly Levy)
00 [01] Tzomet (Oren Hazan) and others
00 [–-] Magen (Gal Hirsch)
00 [–-] Yachad (Eli Yishai)
65 [66] Current Right-Religious Coalition+Y.B.
55 [54] Current Center-Left-Arab Opposition-Y.B
Jeremy's Knesset Insider 
kaphlon and liberman could join KL, no?
If any traditionally right parties eventually sit with Gantz I’d wager it would be YB and Kulanu.
YB is anti religious coercion which would give them a common thread with Yesh Atid and Meretz, though if I’m not mistaken, Lieberman has been called a fascist by the same parties…so that would be a little awkward.
Kulanu is centrist and has its origins in social justice and social equity so I can see them finding common ground as well.
As I’ve mentioned in other posts though, it’ll take more than YB and Kulanu crossing over to give Gantz a viable coalition. In this poll, he’s only got 43 mandates not including the Arab parties.
YB and Kulanu only give him 9 more, which gets him to 52. He’d still need to rack up another 9 to get to a Jewish majority, not a minor detail. No coalition has relied on Arab parties to make it to 61. Maybe Zehut and one of the religious parties? But Gantz would have to have almost everything break his way for that to occur, in my opinion.